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6.20. A convenience store owner wants to know how long his customers spend browsing the store...

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Basic Math

6.20. A convenience store owner wants to know how long hiscustomers spend browsing the store before making a purchase. It isfound that time spent is normally distributed with an average of m= 5 minutes and a standard deviation of s=2 : 2 minutes. Using arandom sample of 14 customers, what is the probability that acustomer, on average, will spend less than 4 minutes browsing thestore?

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