In a recent survey of 655 working Americans ages 2534, the average weekly amount spent on lunch
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In a recent survey of 655 working Americans ages 25–34, the average weekly amount spent on lunch was \($44.60\) with standard deviation \($2.81\). The weekly amounts are approximately bell-shaped.
a. Estimate the percentage of amounts that are between \($36.17\) and $53.03.
b. Estimate the percentage of amounts that are between \($41.79\) and $47.41.
c. Between what two values will approximately 95% of the amounts be?
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