21.7 The two-sample t-test This time, suppose that the samples are not paired; that is, they are independent.
{"Image DocumentName": "21.7 The two-sample t-testThis time, suppose that the samples are not paired; that is, they are independent.", "Image ImageDescription": "The two samples need not contain the same number of observations. The most common test statistic used in this situation is a two-sample t-test (also known as a pooled t-test) The steps for using a two-sample t-test are as follows: 1. Construct the null and alternative (two-tailed) hypotheses. H0 always states that there is no difference between the two samples, while H1 always states that there is some difference between the two samples. H0: \u03bc1 = \u03bc2 v H1: \u03bc1 \u2260 \u03bc2. Copyright \uf0e3 2010 McGraw-Hill Australia Pty Ltd PowerPoint slides to accompany Croucher, Introductory Mathematics and Statistics, 5e.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}