In Exercises 69 and 70, determine whether you can use a normal distribution to
Chapter 5, Problem 69(choose chapter or problem)
In Exercises 69 and 70, determine whether you can use a normal distribution to approximate the binomial distribution. If you can, use the normal distribution to approximate the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities.A survey found that 52% of U.S. teens ages 16 to 18 have a savings account.You randomly select 45 U.S. teens ages 16 to 18 and ask them whether theyhave a savings account. Find the probability that the number who have asavings account is (a) at most 15, (b) exactly 25, and (c) greater than 30, and(d) identify any unusual events. Explain. (Source: Charles Schwab)
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