Please show ALL work. Here isthedataset of people's scores on a measure of aptitude in research methods:

15, 22, 38, 25, 33, 18, 22, 20, 35, 30, 31, 28, 19

In addition to these scores, researchers asked participantsif they had ever taken a research methods course before. Here is the dataset of scores broken down into two groups; those who have taken aresearch methods course and those who have not.

Have Taken Research Methods Course	Have NOT Taken Research Methods Course
22	15
38	25
33	18
35	22
30	20
31	19
28

From these data, calculate the following:

Question 1: Determine an appropriate hypothesis and explain why you think the hypothesis is appropriate. State the null hypothesis.

Question 2: Calculate the mean and variance for each group.

Question 3: Calculate the t-score.

Question 4: Calculate the degrees of freedom.

Question 5: Would you use a one-tailed or two-tailed test? Why?

Question 6: Using a .05 significance level, find the t-value needed to reject the null hypothesis.

Question 7: What is your conclusion about your hypothesis?