ppose that the average gregariousness score for the entire U.S. population is 70. The head research psychologist at Somerville University is interested in determining whether or not he university...

Extracted text: ppose that the average gregariousness score for the entire U.S. population is 70. The head research psychologist at Somerville University is interested in determining whether or not he university psychology students are statistically significantly more gregarious than the overall population. A random sample of 200 students from Somerville University shows a mean of 75 on the gregarious test with a sample standard deviation of 20. d. Calculate the test statistic as identified in "c" above. e. What is the p value associated with test statistic you calculated in "d"? f. Setting alpha of .05, what do you conclude? Are you able to reject the null hypothesis? Why or why not? Explain your answer in as much detail as possible.