Read this section and answer the questions that follows:

Suppose the average number of calories in low-calorie dinner is 600 with a standard deviation of 110 calories.Your friend sells healthy dinners at her restaurant. You believe that, in fact, the average calories for average dinner is different from 600.To test the hypothesis, you took a sample of 16 dinners at your friend's restaurant.The average for this group is 650 calories.

What is the rejection region for this situation?

a. less than -1.645, and greater than 1.645

c. greater than 1.645

b. less than -1.95996, and greater than 1.95996

d. less than 1.645

Should you accept or reject the null hypothesis in this situation?

b. Reject null hypothesis

a. Accept null hypothesis

What is the 95% confidence interval for the population mean?

c. (541.3851,658.6149)

d. (541.7026,658.2974)

b. (546.101,653.899)

a. (601,698.999)