Elementary Statistics Homework: Chapter 5 Score: 0 of 1 pt 5.3.39-? Save 13 of 2

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Elementary Statistics Homework: Chapter 5 Score: 0 of 1 pt 5.3.39-? Save 13 of 20 (19 complete)N Sco A certain TV show recently had a share of 80, meaning that among the TV sets in use, 80% we that an advertiser wants to verify that 80% share value by conducting its own survey, and a pilot households having TV sets in use at the time of the TV show broadcast. Complete parts (a) thro a. Find the probability that all of the households are tuned to the TV show. The probability that all of the households are tuned to the TV show is 0.168 (Round to three decimal places as needed.) b. Find the probability that exactly 7 households are tuned to the TV show. h The probability that exactly 7 households are tuned to the TV show is (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer. remaining Clear All Ch 80 F3 Fr F2 F5 F 6

Explanation / Answer

Ans:

Use binomial distribution with n=8,p=0.8

P(x=r)=8Cr*0.8r*0.28-r

a)P(all are tuned)=0.88=0.168

b)P(exactly 7 are tuned)=8C7*0.87*0.21=0.336

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