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USA Today reported that about 20% of all people in the United States are illiterate. Suppose you take eight people at random off a city street.   (a) Find the mean and standard deviation of this probability distribution. (Round your answers to two decimal places.) ? =  people ? =  people Find the expected number of people in this sample who are illiterate. (Round your answer to two decimal places.)  people (b) How many people would you need to interview to be 73% sure that at least seven of these people can read and write (are not illiterate)? (Enter the smallest number of people needed to be at least 73% sure.)  people

- November 14, 2022 - Edwin Tunner

USA Today reported that about 20% of all people in the United States are illiterate. Suppose you take eight people at random off a city street.

 
(a) Find the mean and standard deviation of this probability distribution. (Round your answers to two decimal places.)

? =  people
? =  people

Find the expected number of people in this sample who are illiterate. (Round your answer to two decimal places.)
 people

(b) How many people would you need to interview to be 73% sure that at least seven of these people can read and write (are not illiterate)? (Enter the smallest number of people needed to be at least 73% sure.)
 people

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