Finite Population

Question

Correlation • Compute the correlation between pretreatment anxiety and depression scores. Write one to two sentences interpreting the analysis.

Question

If a random sample of size n is selected from the finite population that consists of the integers 1,2,…,N, show that the variance of Xbar is ((N+1)(N-n)/12n)

Question

A researcher collects the following data from five high-school students: GPA SAT 2.00 960 3.00 1000 4.00 1300 1.00 650 3.54 1280 What is the correlation between high-school GPA and SAT scores? Report the appropriate null and research hypotheses and the critical value (alpha = 0.05). In addition, provide your statistical conclusion, including calculation of test statistic.

Question

Give an example of a situation related to your current job (or the job you would like to have after graduation) in which you would use a one-way ANOVA. Why did you choose this example? How would this information help you to perform your job duties?

According to you, what are at least two advantages of using an ANOVA as opposed to a t-test? Justify your answers with examples and reasoning