The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivation, attitudes, and study habits of college students. Scores range from 0 to 200 and follow a normal distribution, with mean of 110 and standard deviation 20. You suspect the incoming freshman have a mean which is different from 110 because they are often excited about entering college. You give the SSHA to 50 students who are incoming freshman and find their mean score. You observe a sample mean of 115.35

A. Calculate the Z-score using the above values. Show the work.

B. Find Za/2 from the table corresponding to 90% sin gni

C. Compare the calculated Z-value of question A to conclude if you should reject or not reject the null hypothesis: H0: = 110 Ha: > 110