Sample t-test data: setosa and virginica t = 6.4503, df = 98, p-value = 4.246e-09 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: 0.3143257 0.5936743 sample estimates: mean of x mean of y 3.428 2.974 ※ લఏ݅ͷݕఆ͕ඞཁ