Reconsider Exercises 1.4.4 and 1.4.5 about coffee consumption. Suppose you use an applet and find a null distribution with mean of 0.400 and standard deviation of 0.041. What is the value of the standardized statistic?

A. z = 1.22 

B. z = 0 

C. z = −1.22 

D. z = 10.87 

E. z = 0.10

Data from Exercises 1.4.4

According to the National Coffee Drinking Study from the National Coffee Association, 40% of 18- to 24-year-olds in the United States regularly drink coffee every day. Suppose this number is accurate. In a sample of 140 students at Hope College we found that 63 of them (or 45%) regularly drink coffee. We want to test whether the daily coffee-drinking habits of students at Hope College differ from the 40% claim for the nation. Which of A–E is an appropriate way to set up the hypotheses, in symbols, for this test?