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A grocery​ store's receipts show that Sunday customer purchases have a skewed distribution with a mean...

A grocery​ store's receipts show that Sunday customer purchases have a skewed distribution with a mean of ​$31 and a standard deviation of ​$22. Suppose the store had 297 customers this Sunday.

​a) Estimate the probability that the​ store's revenues were at least ​$9 comma 800.

​b) If, on a typical​ Sunday, the store serves 297 ​customers, how much does the store take in on the worst 10​% of such​ days?

Math   Statistics-And-Probability   
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