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# tif_ch10 [EDocFind.com] - Two-Sample Tests with Numerical...

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Two-Sample Tests with Numerical Data 5 CHAPTER 10: TWO-SAMPLE TESTS WITH NUMERICAL DATA 1. The t test for the difference between the means of 2 independent populations assumes that the respective a) sample sizes are equal. b) sample variances are equal. c) populations are approximately normal. d) all of the above ANSWER: c TYPE: MC DIFFICULTY: Moderate KEYWORDS: pooled-variance t test, assumption 2. The t test for the mean difference between 2 related populations assumes that the respective 3. If we are testing for the difference between the means of 2 related populations with samples of n 1 = 20 and n 2 = 20, the number of degrees of freedom is equal to

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6 Two-Sample Tests with Numerical Data 4. If we are testing for the difference between the means of 2 independent populations with samples of n 1 = 20 and n 2 = 20, the number of degrees of freedom is equal to 5. In what type of test is the variable of interest the difference between the values of the observations rather than the observations themselves? a) a test for the equality of variances from 2 independent populations b) a test for the difference between the means of 2 related populations c) a test for the difference between the means of 2 independent populations d) all of the above ANSWER: b TYPE: MC DIFFICULTY: Moderate KEYWORDS: t test for mean difference 6. In testing for the differences between the means of 2 independent populations, where the variances in each population are unknown but assumed equal, the degrees of freedom are 7. In testing for differences between the means of 2 related populations, where the variance of the differences is unknown, the degrees of freedom are
Two-Sample Tests with Numerical Data 7

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