SOC 4930 & SOC 5050 - Lecture-01

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There is a quick anonymous poll to respond to at   https://PollEv.com/chrisprener541 - you can skip creating a nickname! If you have not already completed the Course Onboarding and Course Preview tasks, please ﬁnish them! Details at:  https://slu-soc5050.github.io/course-onboarding/ WELCOME! WELCOME TO SOC 4015 & 5050!

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COURSE INTRODUCTION QUANTITATIVE ANALYSIS CHRISTOPHER PRENER, PH.D. FALL 2018 WEEK 01 LECTURE 01

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AGENDA QUANTITATIVE ANALYSIS / WEEK 01 / LECTURE 01 1. Front Matter 2. Syllabus Overview 3. Deﬁning Quantitative Data 4. What is a Workﬂow? 5. Introduction to R 6. Back Matter

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1 FRONT   MATTER

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Course Onboarding and Course Preview materials were due today - please submit asap! Details on course website. 1. FRONT MATTER ANNOUNCEMENTS We’ll start every class with “Front Matter” - goal is to share what we are covering, what due dates are coming up, and any announcements. No class next week, but there is coursework! Before Lecture-03: Lab-01, LP-03, Final Project Memo

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▸ Assistant Professor of Sociology • Coordinator, Sociology Honors Thesis ▸ Curriculum advisor & lesson maintainer for The Carpentries’ Social Science and Geospatial Lessons ▸ Former EMT and EMS Dispatcher ▸ I wanted to be a ED physician once upon a time 1. FRONT MATTER ABOUT CHRIS

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▸ Other things I teach: • SOC 1120: Introduction to Sociology (Health/Diversity emphasis) • SOC 3220: Urban Sociology & The Wire • SOC 4650/5650: Intro to GIS • SLU Data Science Seminar 1. FRONT MATTER ABOUT CHRIS

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▸ Things I research: • Paramedic work and the EMS system as a part of the social safety-net • Neighborhood order (and disorder) in St. Louis • Mental health outcomes, literacy, and discrimination • Approaches to processing “big” and complex data 1. FRONT MATTER ABOUT CHRIS

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1. FRONT MATTER ABOUT CHRIS

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INTRODUCTIONS 1. FRONT MATTER 1. What is your name? 2. What program are you enrolled in, and what year are you? 3. What was one excellent adventure you had this summer?

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SYLLABUS OVERVIEW 2

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2. SYLLABUS OVERVIEW SYLLABUS https://slu-soc5050.github.io/syllabus/

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2. SYLLABUS OVERVIEW SYLLABUS https://slu-soc5050.github.io/syllabus/

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Pierre Bourdieu On Television  (1996) THE FUNCTION OF SOCIOLOGY, AS OF EVERY SCIENCE, IS TO REVEAL   THAT WHICH IS HIDDEN. empirically ^

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seeing like a  social scientist,

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seeing like a  social scientist,  thinking like a  data scientist

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data scientist statistics substantive  knowledge communication  & visualization programming

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COURSE OBJECTIVES 2. SYLLABUS OVERVIEW 1. Fundamentals of Inferential Statistics 2. Fundamentals of Data Analysis 3. Fundamentals of Data Visualization 4. Quantitative Research Synthesis

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COURSE OBJECTIVES 2. SYLLABUS OVERVIEW 1. Fundamentals of Inferential Statistics - Describe the use of various statistical tests, their requirements and assumptions, and their interpretation; execute these tests both by hand and programmatically using R 2. Fundamentals of Data Analysis 3. Fundamentals of Data Visualization 4. Quantitative Research Synthesis

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COURSE OBJECTIVES 2. SYLLABUS OVERVIEW 1. Fundamentals of Inferential Statistics 2. Fundamentals of Data Analysis - Perform basic data cleaning and analysis tasks programmatically using R in ways that support high quality documentation and replication. 3. Fundamentals of Data Visualization 4. Quantitative Research Synthesis

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COURSE OBJECTIVES 2. SYLLABUS OVERVIEW 1. Fundamentals of Inferential Statistics 2. Fundamentals of Data Analysis 3. Fundamentals of Data Visualization - Create and present publication quality plots programmatically using R and ggplot2. 4. Quantitative Research Synthesis

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COURSE OBJECTIVES 2. SYLLABUS OVERVIEW 1. Fundamentals of Inferential Statistics 2. Fundamentals of Data Analysis 3. Fundamentals of Data Visualization 4. Quantitative Research Synthesis - Plan, implement (using R), and present (using knitr as well as the word   processing and presentation applications of   your choice) a research project that uses   linear regression to answer a research   question.

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2. SYLLABUS OVERVIEW READINGS

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2. SYLLABUS OVERVIEW WEBSITE https://slu-soc5050.github.io/

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2. SYLLABUS OVERVIEW WEBSITE https://slu-soc5050.github.io/

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2. SYLLABUS OVERVIEW WEBSITE https://slu-soc5050.github.io/

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2. SYLLABUS OVERVIEW GITHUB https://github.com/slu-soc5050

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2. SYLLABUS OVERVIEW GITHUB https://github.com/slu-soc5050

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2. SYLLABUS OVERVIEW SLACK https://slu-soc5050.slack.com

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COURSE POLICIES 2. SYLLABUS OVERVIEW 1. Compassionate Coursework & Title IX 2. Attendance & Participation 3. Communication 4. Electronic Devices 5. Student Support 6. Academic Honesty 7. Submission & Late Work

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Install the tidyverse package Caution Text WELCOME! GETTING STARTED Announcement Text

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PRACTICE MINDFULNESS 2. SYLLABUS OVERVIEW

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PRACTICE PATIENCE 2. SYLLABUS OVERVIEW

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PRACTICE COMPASSION 2. SYLLABUS OVERVIEW

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2. SYLLABUS OVERVIEW THREADS IN SLACK Use threads to respond if someone posts a question that you also had, to ask a clariﬁcation question, or to thank someone for posting! Hover your mouse over a message to reveal a mini toolbar:

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2. SYLLABUS OVERVIEW THREADS IN SLACK Emojis can be used to respond quickly to people’s posts. They are absolutely encouraged! Hover your mouse over a message to reveal a mini toolbar:

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2. SYLLABUS OVERVIEW #WEEKLY-WINS If something works right, you learn something new or something that you’re excited about, if someone else was particularly helpful… share it!

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2. SYLLABUS OVERVIEW #WEEKLY-WINS If something works right, you learn something new or something that you’re excited about, if someone else was particularly helpful… share it!

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ASSIGNMENTS 2. SYLLABUS OVERVIEW 1. Attendance & Participation 2. Lecture Preps 3. Labs 4. Problem Sets 5. Final Project 10% 6% 15% 28% 41% 100 60 150 280 410 1,000 2*50 = 4*15 = 10*150 = 8*35 =

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ASSIGNMENTS 2. SYLLABUS OVERVIEW 1. Attendance & Participation 2. Lecture Preps 3. Labs 4. Problem Sets 5. Final Project + - Excellent Satisfactory Substantial  Improvement  Needed 100% 85% 75% Feedback only for and _ -

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ASSIGNMENTS 2. SYLLABUS OVERVIEW 1. Attendance & Participation 2. Lecture Preps 3. Labs 4. Problem Sets 5. Final Project within 24-hours 24 to 48-hours 48 to 72-hours -15% -30% -45% > 72-hours -100%

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COURSE “FLOW” Active reading Lecture prep Entry ticket* Active lecture Lab Problem set Before class During class After class

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DEFINING QUANTITATIVE DATA 3

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SIX IMPORTANT TRENDS a

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3. DEFINING QUANTITATIVE DATA TRENDS: DATA SCIENCE statistics substantive  knowledge communication  & visualization programming

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3. DEFINING QUANTITATIVE DATA TRENDS: SMARTPHONES

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3. DEFINING QUANTITATIVE DATA TRENDS: BIG DATA

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3. DEFINING QUANTITATIVE DATA TRENDS: MACHINE LEARNING

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3. DEFINING QUANTITATIVE DATA TRENDS: OPEN SOURCE

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3. DEFINING QUANTITATIVE DATA TRENDS: MARKET CHANGES “Old” Academic Market Enterprise   Market Applied  Data Science   Market Academic   Market

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WHAT ARE QUANTITATIVE DATA? b PRO TIP: “Data” is the plural form of “datum”

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WHAT ARE QUANTITATIVE DATA? ▸ Data that can be represented numerically ▸ Data that can (typically) be analyzed using statistical techniques 3. DEFINING QUANTITATIVE DATA Quantitative Qualitative

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▸ Randomized control trials (RCTs) are the “gold standard” ▸ Well designed experiments - large ones where there is essentially a 50/50 chance of being in a control or experimental group - allow us to isolate the effect of an intervention ▸ Non-randomized experiments, like the portacaval shunt experiments, can bias results 3. DEFINING QUANTITATIVE DATA EXPERIMENTS JONAS SALK (1957)

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▸ Studies where data are collected from a (typically) large, pre-existing group ▸ Subjects assign themselves into different groups rather than being assigned by a researcher ▸ Observational studies can be affected by confounding - phenomena associated with both the intervention and the outcome 3. DEFINING QUANTITATIVE DATA OBSERVATIONAL DATA

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WHAT DO QUANTITATIVE DATA LOOK LIKE? c

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3. DEFINING QUANTITATIVE DATA THEY ARE “TABULAR”

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HAPPY FAMILIES ARE ALL ALIKE; EVERY UNHAPPY FAMILY IS UNHAPPY IN ITS OWN WAY Leo Tolstoy Anna Karenina  (1878)

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LIKE FAMILIES, TIDY DATASETS ARE ALL ALIKE BUT EVERY MESSY DATASET IS MESSY IN ITS OWN WAY. Hadley Wickham “Tidy Data”  (2014)

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▸ Columns = “Variables” ▸ Variables should measure a single characteristics, concept, or idea ▸ Rows = “Observations” ▸ Observations (n) represent discrete individuals whose characteristics are measured by the given set of variables ▸ Cells contain “Values” 3. DEFINING QUANTITATIVE DATA TIDY DATA

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3. DEFINING QUANTITATIVE DATA TIDY DATA Each data set should contain one, and only one, observational unit!

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▸ Types of Data • Numeric - data are numbers that may have particular “labels” applied to them to represent “attributes” • String or Character - data are letters or words 3. DEFINING QUANTITATIVE DATA TIDY DATA

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▸ Levels of Measurement • Numerical - can take on a wide range of values where order is important • Categorical - can take on only a limited number of values where order is important but ﬂexible 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Binary variables represent the presence or absence of a characteristic • No/Yes and True/False are common examples 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Binary variables represent the presence or absence of a characteristic • No/Yes and True/False are common examples 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES 0 = No 1 = Yes Value Label Attributes 0 = False 1 = True Value Label Attributes

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▸ Levels of Measurement • Binary variables represent the presence or absence of a characteristic • No/Yes and True/False are common examples • Sometimes called “dummy” or “logical” variables 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS LOGICAL NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Nominal variables represent categories where order is unimportant (values could be reordered without loss of meaning) • Race, gender, and states are all examples 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Nominal variables represent categories where order is unimportant (values could be reordered without loss of meaning) • Race, gender, and states are all examples 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES 1 = White 2 = African American 3 = American Indian 4 = Asian 5 = Native Hawaiian Value Label Attributes

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▸ Levels of Measurement • Nominal variables represent categories where order is unimportant (values could be reordered without loss of meaning) • Race, gender, and states are all examples • Sometimes called “factor” variables 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY FACTOR ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Ordinal variables represent categories where relative order is important but there is not a precise or ﬁxed difference between values • Likert scales are a common type 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Ordinal variables represent categories where relative order is important but there is not a precise or ﬁxed difference between values • Likert scales are a common type 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES 1 = Strongly disagree 2 = Disagree 3 = Neither agree nor disagree 4 = Agree 5 = Strongly agree Value Label Attributes

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▸ Levels of Measurement • Ordinal variables represent categories where relative order is important but there is not a precise or ﬁxed difference between values • Likert scales are a common type • Sometimes called “ordered factors” 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDERED FACTOR RATIO VARIABLES

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▸ Levels of Measurement • Discrete variables can take on only whole, non- negative integers for values • Age in years and population counts are common examples 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Discrete variables can take on only whole, non- negative integers for values • Age in years and population counts are common examples • Sometimes called “integer” variables 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL INTEGER CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Continuous variables can take on any value within an inﬁnite set of real numbers • Cost can be represented this way 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Continuous variables can take on any value within an inﬁnite set of real numbers • Cost can be represented this way 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES Income: -k…1, 2.24, 3.42… k Value Largest   Possible Value Smallest   Possible Value

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▸ Levels of Measurement • Continuous variables can take on any value within an inﬁnite set of real numbers • Cost can be represented this way • In R, these are called “numeric” variables 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE NUMERIC BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • Ratio variables can take on any real value that is ≥ 0 where 0 represents the condition of “not” having something • Both discrete and continuous variables can also be ratio variables • Number of children and age are examples 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES NUMERICAL CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES

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▸ Levels of Measurement • In practice, we often refer to all numerical variables simply as “continuous” variables. 3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES CATEGORICAL DISCRETE CONTINUOUS BINARY NOMINAL ORDINAL RATIO VARIABLES NUMERICAL CONTINUOUS

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3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES CATEGORICAL BINARY NOMINAL ORDINAL VARIABLES NUMERICAL CONTINUOUS

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3. DEFINING QUANTITATIVE DATA VARIABLES & VALUES CATEGORICAL BINARY NOMINAL ORDINAL VARIABLES NUMERICAL CONTINUOUS You need to be able to distinguish between these types easily - Quizlet available via course website!

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WHAT ARE QUANTITATIVE DATA USED FOR? d

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3. DEFINING QUANTITATIVE DATA DRAWING INFERENCE

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3. DEFINING QUANTITATIVE DATA GENERALIZATION = 1 observation Universe or Population

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3. DEFINING QUANTITATIVE DATA GENERALIZATION = 1 observation Sample  Population Universe

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3. DEFINING QUANTITATIVE DATA GENERALIZATION = 1 observation Sample  Population Sample Universe

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3. DEFINING QUANTITATIVE DATA GENERALIZATION = 1 observation Sample  Population Sample Draw Inferences  About Population Universe

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3. DEFINING QUANTITATIVE DATA PREDICTION

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WHAT IS A WORKFLOW? 4

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4. WHAT IS A WORKFLOW? HOW DO YOU CHECK YOUR EMAIL? 12

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4. WHAT IS A WORKFLOW? WORKFLOWS SOLVE PROBLEMS 33,425 There are two types of people in this world…

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1 2 1. Draw some circles 2. Draw the rest of the owl HOW TO DRAW AN OWL…

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THAT IS NOT HELPFUL 4. WHAT IS A WORKFLOW?

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4. WHAT IS A WORKFLOW? WORKFLOWS SOLVE PROBLEMS EXPLICITLY 33,425 There are two types of people in this world…

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4. WHAT IS A WORKFLOW? INBOX ZERO WORKFLOW UPDATE INBOXES SEVERAL TIMES PER DAY DELETE SPAM, JUNK READ REMAINING MESSAGES DOES RESPONDING TAKE > 2 MINUTES? RESPOND YES SNOOZE FOR LATER 5:45AM   & 4:00PM PROCESSING ARCHIVE RESPOND NO

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4. WHAT IS A WORKFLOW? WE HAVE A REPRODUCIBILITY PROBLEM Baker, M. 2016. “1,500 scientists lift the lid on reproducibility.” Nature News 533(7604):452-54.

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4. WHAT IS A WORKFLOW? WE HAVE A REPRODUCIBILITY PROBLEM Baker, M. 2016. “1,500 scientists lift the lid on reproducibility.” Nature News 533(7604):452-54.

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4. WHAT IS A WORKFLOW? OUR WORKFLOW 1. Plan 2. Organize 3. Document 4. Execute For Each  Step:

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INTRODUCTION TO R 5

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5. INTRODUCTION TO R STATISTICAL COMPUTING TABULATING MACHINE HERMAN HOLLERITH   (1860-1929)

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5. INTRODUCTION TO R STATISTICAL COMPUTING PUNCH CARD (~1895) HERMAN HOLLERITH   (1860-1929)

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GRAPHIC DESIGN TANGENT 5. INTRODUCTION TO R PAUL RAND (1914-1996)

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AESTHETICS AND DESIGN MATTER

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GRAPHIC DESIGN TANGENT 5. INTRODUCTION TO R IBM MAINFRAME COMPUTER (~1957)

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5. INTRODUCTION TO R STATISTICAL COMPUTING 1968 - SPSS and SAS released for IBM Mainframe

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5. INTRODUCTION TO R STATISTICAL COMPUTING 1980s - SPSS, SAS, and Stata released for personal computers

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5. INTRODUCTION TO R STATISTICAL COMPUTING 1992 - R development begins

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STATISTICAL COMPUTING ▸ 1997 - beta version released online ▸ 2000 - ﬁrst stable release ▸ 2004 - ﬁrst useR! conference ▸ 2011 - RStudio beta released ▸ 2013 - tidyverse packages begin to coalesce ▸ 2016 - RStudio v1.0 released 5. INTRODUCTION TO R

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▸ what takes the message you wish to display ▸ by is one the valid animal types that can be displayed Available in cowsay  Download via CRAN 5. INTRODUCTION TO R ASCII MESSAGES Parameters: say(what = “message”, by = “animal”) f(x)

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▸ what takes the message you wish to display ▸ by is one the valid animal types that can be displayed 5. INTRODUCTION TO R ASCII MESSAGES Parameters: say(what = “message”, by = “animal”) f(x)

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ASCII MESSAGES 5. INTRODUCTION TO R say(what = “message”, by = “animal”) Using a famous green jedi: > say(what = “do or do not, there is no try”,   by = “yoda”) Output omitted (see next slide) Animals must be drawn from the items listed in the animals object! f(x)

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ASCII MESSAGES > library(cowsay) > say(what = "do or do not, there is no try", by = "yoda") ----- do or do not, there is no try ------ \ \ ____ _.' : `._ .-.'`. ; .'`.-. __ / : ___\ ; /___ ; \ __ ,'_ ""--.:__;".-.";: :".-.":__;.--"" _`, :' `.t""--.. '<@.`;_ ',@>` ..--""j.' `; `:-.._J '-.-'L__ `-- ' L_..-;' "-.__ ; .-" "-. : __.-" L ' /.------.\ ' J "-. "--" .-" __.l"-:_JL_;-";.__ .-j/'.; ;"""" / .'\"-. .' /:`. "-.: .-" .'; `. .-" / ; "-. "-..-" .-" : "-. .+"-. : : "-.__.-" ;-._ \ 5. INTRODUCTION TO R

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6 BACK   MATTER

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AGENDA REVIEW 6. BACK MATTER 2. Syllabus Overview 3. Deﬁning Quantitative Data 4. What is a Workﬂow? 5. Introduction to R

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No class next week, but there is coursework! REMINDERS 6. BACK MATTER Course Onboarding and Course Preview materials were due today - please submit asap! Details on course website. We’ll end every class with “Back Matter” - goal is to share what we are covering, what due dates are coming up, and any announcements. Before Lecture-03: Lab-01, LP-03, Final Project Memo