13. Companies are interested in the demographics of those who listen and call in to the radio programs they sponsor. Suppose that only 20% of listeners phoning in to a morning talk show are male. (a) If the station takes a random sample of 200 callers, what is the probability that the sample proportion of males will be at least 0.25? (b) The station management wonders if adding a male host to the program will increase the proportion of callers who are male. After adding the male host, the station selects a random sample of 200 callers and finds that 25% are male. Does this provide convincing evidence to suggest that the proportion of male callers has increased from 20%? Explain.

13. Companies are interested in the demographics of those who listen and call in to the radio programs they sponsor. Suppose that only 20% of listeners phoning in to a morning talk show are male. (a) If the station takes a random sample of 200 callers, what is the probability that the sample proportion of males will be at least 0.25? (b) The station management wonders if adding a male host to the program will increase the proportion of callers who are male. After adding the male host, the station selects a random sample of 200 callers and finds that 25% are male. Does this provide convincing evidence to suggest that the proportion of male callers has increased from 20%? Explain.

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...

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