A researcher would like to determine whether a particular treatment has an effect on performance scores. A sample of n = 16 subjects is selected. Each subject is measured before receiving treatment and again after treatment. The researcher records the difference between the two scores for each subject. The difference scores averaged: D = -6 with SD = 2 We will use = .05 Question 1: What are the null and alternative hypotheses, respectively? Write out using appropriate statistical notation. Question 2: With n = 16, what are the df?? Remember that for repeated-measures t-tests, df = n-1. Question 3: Given the df above, what is the critical value. (Use the table at the end of your book.) Question 4: What is the standard error for the t statistic? Remember that sD = sD / N Question 5: What is the value of the t-statistic? Remember that t= D - / sD Question 6: Should the null hypothesis be accepted or rejected