n a recent survey of655 working Americans ages 25-34, the average weekly amount spent on lunch was$45.73 with standard deviation$3.00. The weekly amounts are approximately bell-shaped.

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(a) Estimate the percentage of amounts that are between$42.73and$48.73

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68% 75% 95% 88.9%---choose one

of the amounts fall between$42.73and$48.73

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