may I get an explanation and help for my practice exam please ? All 4 please .

Question 45 8 pts What is the value of the appropriate test statistic for the statistical test of the mean? Note: Round answer to 3 Decimal Places Question 46 2 pts What is the correct Critical Value for this statistical test of the mean? - (Input same number of decimal places as presented in Table - or on your formula sheet)Question 47 5 pts If Appropriate, calculate the 95% Confidence Interval. What is the Upper Bound Value? Note: If appropriate to calculate, Round answer to 2 decimal places. If not appropriate to calculate, input 999 D Question 48 5 pts If appropriate, calculate the effect size (d). What is the value of the effect size? Note: If appropriate to calculate, Round answer to 2 decimal places If not appropriate to calculate, input 999Use the following information to answer the following 4 questions. A well established measure of motivation has a population mean of 69 and a population standard deviation of 9. Dr. Bonham selects 8 high school students who have been identified as low in motivation to participate in his new motivation enhancing program for 6 months; the sample mean is 75. The data are listed below. Dr. Bonham wants to maximize the power of the test. X 81 80 79 78 76 75 71 60 Mean 75