Question 1 (Use appropriate one sample test. you can use either p-value or traditional approach, need to draw a diagram and mark, Fail to Reject region and Rejection region and other values, Follow the format of the class handout. All answers to be handwritten) A salesman believes that senior citizens (people aged above 60) buy groceries for less than 40 dirhams during weekends. To test this, the salesman randomly selects 40 senior citizens and computed their mean purchases as 38 dirhams and a standard deviation of 4 dirhams. Do the data indicate that the mean spending is less than what the salesman believes? Assume aa=.10