A researcher collects data that represents the average number of hours of sleep in the last two nights by 8 depressed patients and 9 non-depressed patients. The researcher is interested in whether the two groups reliably differ in the amount of sleep they get. 1.Which statistical test is appropriate here. Why? 2.What are the null and alternative hypotheses? (Make these two-tailed.) 3.How many degrees of freedom are there? What is tcrit (alpha = 0.05, 2tail)? 4.Calculate tobt by hand, using the mean and s.d data from Jamovi 5.What is your conclusion about H0, using alpha = 0.05, 2tail? What is the basis for your decision? In addition to stating whether the null should be rejected or not, say what that conclusion MEANS in the context of this particular situation.

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