Question 5.16

5.16 Restaurant survey.

Return to the survey described in Exercise 5.8 (page 250). You plan to use random digit dialing to contact an SRS of 200 households by telephone rather than just 20.

  1. What are the mean and standard deviation of the number of nutrition conscious people in your sample if is true?
  2. What is the probability that lies between 75 and 85? (Use the Normal approximation.)