johntrinh9880 johntrinh9880

26-12-2023
Social Studies

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Lunch break: In a recent survey of 669 working Americans ages 25-34, the average weekly amount spent on lunch was $46.16 with a standard deviation of $2.86. The weekly amounts are approximately bell-shaped. Estimate the percentage of amounts that were less than $__. Round the answer to one decimal place.

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elijahpierre672 elijahpierre672

26-12-2023

Answer:

To estimate the percentage of amounts that were less than a certain value, we need to use the empirical rule (also known as the 68-95-99.7 rule) for bell-shaped distributions. This rule states that approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations.

Explanation:

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