A large cable company reports the following. 80% of its customers subscribe to its cable TV service 39% of its customers subscribe to its Internet service 28% of its customers subscribe to its telephone service 23% of its customers subscribe to both its cable TV and Internet service 19% of its customers subscribe to both its cable TV and phone service 20% of its customers subscribe to both its Internet and phone service 15% of its customers subscribe to all three services Consider the chance experiment that consists of selecting one of the cable company customers at random. Find and interpret the following probab (a) P (cable TV only) READ AND COMPLETE THE FOLLOWING STATEMENT. cable TV only A large cable company reports the following. 80% of its customers subscribe to its cable TV service 39% of its customers subscribe to its Internet service 28% of its customers subscribe to its telephone service 23% of its customers subscribe to both its cable TV and Internet service 19% of its customers subscribe to both its cable TV and phone service 20% of its customers subscribe to both its Internet and phone service 15% of its customers subscribe to all three services Consider the chance experiment that consists of selecting one of the cable company customers at random. Find and interpret the following probab aPcable TV only) READ AND COMPLETE THE FOLLOWING STATEMENT P(cable TV only= % of cable company customers only subscribe to cable TV. (bP(Internet|cable TV READ AND COMPLETE THE FOLLOWING STATEMENT P(Internet|cable TV= Of the customers who subscribe to cable TV % subscribe to Internet service cPexactly two services READ AND COMPLETE THE FOLLOWING STATEMEN P(exactly two services= cable TV and phone, or Internet and phone). % of cable company customers subscribe to exactly two services (cable TV a dP(Internet and cable TV only) P(Internet and cable TV only= % of cable company customers subscribe to Internet and cable TV only
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P(cable TV only) = P(cable TV) - P(cable TV and Internet) - P(cable TV and phone) + P(all three services) P(cable TV only) = 0.80 - 0.23 - 0.19 + 0.15 P(cable TV only) = 0.53 So, 53% of cable company customers only subscribe to cable TV. Show more…
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How well do airline companies serve their customers? A study showed the following customer ratings: 3% excellent, 28% good, 45% fair, and 24% poor. In a follow-up study of service by telephone companies, assume that a sample of 400 adults found the following customer ratings: 24 excellent, 124 good, 172 fair, and 80 poor. Is the distribution of the customer ratings for telephone companies different from the distribution of customer ratings for airline companies? State the appropriate null and alternative hypothesis. a. H0: Distribution of customer rating for telephone companies is not different than airline companies. AND Ha: Distribution of customer rating for telephone companies is different than airline companies b. H0: Distribution of customer rating for telephone companies is different than airline companies. AND Ha: Distribution of customer rating for telephone companies is not different than airline companies c. H0: Distribution of customer rating for telephone companies is independent of airline companies. AND Ha: Distribution of customer rating for telephone companies is dependent on airline companies d. H0: Distribution of customer rating for telephone companies is dependent on airline companies. AND Ha: Distribution of customer rating for telephone companies is independent of airline companies B) Calculate the appropriate test statistic Select one: A. 12.3556 B. 11.345 C. 10.7334 D. 16.3079 C) Assume alpha is 1%. Define the critical test statistic and specify your conclusion. Select one: A. 2 = 11.345. Failed to reject the null hypothesis. The distribution rating for telephone companies is not significantly different than airline companies. B. 2 = 11.345. Reject the null hypothesis. The distribution rating for telephone companies is significantly different than airline companies. C. 2 = 11.345. Failed to reject the null hypothesis. The distribution rating for telephone companies is significantly different than airline companies. D. 2 = 11.345. Reject the null hypothesis. The distribution rating for telephone companies is not significantly different than airline companies.
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