An increasing number of consumers believe they have to look out for themselves in the marketplace. According to a survey conducted by the Yankelovich Partners forUSA WEEKENDmagazine, 60% of all consumers have called an 800 or 900 telephone number for information about some product. Suppose a random sample of 19 consumers is contacted and interviewed about their buying habits.Appendix A Statistical Tables
a. What is the probability that 11 or more of these consumers have called an 800 or 900 telephone number for information about some product?
b. What is the probability that more than 14 of these consumers have called an 800 or 900 telephone number for information about some product?
c. What is the probability that fewer than 7 of these consumers have called an 800 or 900 telephone number for information about some product?