USA Today reported that about 20% of all people in the United States are illiterate. Suppose you take seven people at random off a city street. USE SALT (a) Find the mean and standard deviation of this probability distribution. (Round your answers to two decimal places.) μ= 0 = 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 94% 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 94% sure.) people

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