Applied Statistics (Entire Course) - Statistics - 11.2.1 Hypothesis Testing for 2 Sample Means (σ unknown) - Unequal Variances

In this video, we continue our study of two-sample hypothesis testing. When dealing with sample means where sigma is unknown, it is important to determine whether we can expect the variances of each population to be equal. That is, do we expect the spread of each population to be the same? The answer to that question will change our calculations. 0:00 Intro 0:10 Reference Sheet 1:32 Example 1 - Problem Statement and Check Conditions 3:50 Example 1 - State Hypotheses and Calculate Statistics 6:19 Example 1 - Draw Conclusion and Interpret Decision 7:05 Example 1 - Support with Confidence Interval 8:09 Example 1 - Using Excel 12:24 Up Next Power Point: https://bellevueuniversity-my.sharepoint.com/:p:/g/personal/kbrehm_bellevue_edu/EbAcdKlw331DsEIbdjA-5mcBrNSXxPQMXDzIANWskQZK8A?e=H1I0ct Confidence Interval Decision Tree: https://bellevueuniversity-my.sharepoint.com/:b:/g/personal/kbrehm_bellevue_edu/EbcsvXnQcsxAjGEmqReLNS4B-bxNVp6EzXRPrsFLxbaUSQ?e=ehmDq1 Hypothesis Testing Decision Tree: https://bellevueuniversity-my.sharepoint.com/:b:/g/personal/kbrehm_bellevue_edu/Ea6wo_3qR69HqiKzJBvsCY8Bn1HBDw8thED70zuAhU81CQ?e=IgbeO4 This playlist follows the text, Beginning Statistics, 3rd ed, Warren, Denley, Atchley Playlist: https://www.youtube.com/playlist?list=PLl-gb0E4MII1dkfGxmdt8YA0Dgabdvdmq