Mark McGwires home runs. In 1998, Mark McGwire of the St. LouisCardinals hit 70 home

Chapter 0, Problem 13.11

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Mark McGwires home runs. In 1998, Mark McGwire of the St. LouisCardinals hit 70 home runs, a new major league record. Was this feat as surprisingas most of us thought? In the three seasons before 1998, McGwire hit a home runin 11.6% of his times at bat. He went to bat 509 times in 1998. McGwires homerun count in 509 times at bat has approximately the binomial distribution withn = 509 and p = 0.116. What is the mean number of home runs he will hit in509 times at bat? What is the probability of 70 or more home runs? (Use theNormal approximation.)

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