1. A scientist claims that the average adult sleeps more than 7.5 hours each night. Suppose we have data from a random sample of 100 adults and wish to test this claim using hypothesis testing.

Which of the following would be an appropriate null hypothesis, and on which side would the rejection region lie?

(a)Null hypothesis: < 7.5; rejection region on the left side

(b)Null hypothesis: 7.5; rejection region on the right side

(c)Null hypothesis: 7.5; rejection region on the left side

(d)Null hypothesis: > 7.5; rejection region on the right side

Question 2. Using the information in question 1, what is the t-cutoff value? Assume an value of 0.05. Round your answer to two decimal places.