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Suppose that spending amount at a local grocery store is normally distributed with a mean of $82 and a standard deviation of $23.
1) Using the empirical rule, approximately 68% of the distribution falls between what two values?
2) Your manager is interested in learning how often people make purchases of at least $100. What is the probability a customer spends at least $100?
3) What is the probability a customer spends between $70 and $100?
4) Your manager is interested in the "one percenters," i.e. shoppers who fall into the top one percent in terms of transaction amount. What dollar amount qualifies a customer as a "one percenter"?
5) 90% of all transactions fall between what two values?
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