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A waitress believes the distribution of her tips has a model that is slightly skewed to...

A waitress believes the distribution of her tips has a model that is slightly skewed to the left, with a mean of $9.70 and a standard deviation of $5.20. She usually waits on about 60 parties over a weekend of work.

A) Estimate the probability that she will earn at least $700?

B) How much does she earn on the best 5% of such weekends?

Math   Statistics-And-Probability   
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