5. For each of the following determine if a paired t-test or a two-sample t-test is appropriate: a. The weights of marathon runners were taken before and after a run to test if runners lose dangerous levels of fluid. b. Do levels of knowledge about current events differ between freshmen and juniors in college?
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A two-sample t-test is used when the data is independent, meaning that the two samples are not related. Show more…
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A one-sample t test in SPSS produces the following output. What is the effect size? One-Sample Statistics N Mean Std. Deviation Std. Error Mean Age 45 61.36 6.555 .977 One-Sample Test Test Value = 65 t df Sig. (2-tailed) Mean Difference 95% Confidence Interval of the Difference Lower Upper Age -3.730 44 .001 -3.644 -5.61 -1.68 -3.73 .001 -3.64 -.56
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