In a recent survey of 655 working Americans ages −2534 , the average weekly amount spent on lunch was $43.65 with standard deviation $3.05 . The weekly amounts are approximately bell-shaped. Estimate the percentage of amounts that are between $34.50 and $52.80

MATLAB: An Introduction with Applications
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In a recent survey of

655

working Americans ages

−2534

, the average weekly amount spent on lunch was

$43.65

with standard deviation

$3.05

. The weekly amounts are approximately bell-shaped.

Estimate the percentage of amounts that are between $34.50 and $52.80

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