labels/ categories; no meaningful order to values Depict the order of a measurement, but not the difference between integers Depict the order and difference between integers (“interval” = distance between entities); No “true” zero Depict the order and difference between integers; “True” zero ✓ Genders ✓ Countries ✓ Cities ✓ Occupations ✓ Likert-scale survey responses ✓ “Star” ratings ✓ Interval/ratio data expressed as categories ✓ IQ Scores ✓ Temperature ✓ Age ✓ Income ✓ Budgets
labels/ categories; no meaningful order to values Depict the order of a measurement, but not the difference between integers Depict the order and difference between integers (“interval” = distance between entities); No “true” zero Depict the order and difference between integers; “True” zero ✓ Mode ✓ Mode ✓ Median ✓ Mode ✓ Median ✓ Mean ✓ Mode ✓ Median ✓ Mean
spread from the mean Interquartile Range: Spread from the median (Q3-Q1) Measures of Dispersion “Spread” of data; how far the data diverge from the data “center”
labels/ categories; no meaningful order to values Depict the order of a measurement, but not the difference between integers Depict the order and difference between integers (“interval” = distance between entities); No “true” zero Depict the order and difference between integers; “True” zero ✓ Mode ✓ Mode ✓ Median ✓ Interquartile range ✓ Mode ✓ Median ✓ Mean ✓ Interquartile range ✓ Standard deviation ✓ Mode ✓ Median ✓ Mean ✓ Interquartile range ✓ Standard deviation
agree nor disagree = 3 Disagree = 2 Strongly disagree = 1 Mean = 3.13 Mode = 5 Mean = 3.16 Mode = 3 Indicate your level of agreement that this is an overall effective course...
modes) Crosstabs • Controlling for a third variable in crosstabs Measures of association • Appropriate correlation analysis for level of measurement (i.e. nominal, ordinal, interval); Johnson, pg. 208 • Direction of relationship • Strength of relationship (correlation coefficient = r); Johnson, pg. 206