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A survey of adults ages​ 18-29 found that 85​% use the Internet. You randomly select 157...

A survey of adults ages​ 18-29 found that 85​% use the Internet. You randomly select 157 adults ages​ 18-29 and ask them if they use the Internet. ​(a) Find the probability that exactly 134 people say they use the Internet. ​(b) Find the probability that at least 134 people say they use the Internet. ​(c) Find the probability that fewer than 134 people say they use the Internet. ​(d) Are any of the probabilities in parts​ (a)-(c) unusual? Explain. Use a normal approximation to the binomial distribution if possible.

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Answer #1

d) ( since we use approximate value not exact value)

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