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In a large sample of customer accounts, a utility company determined that the average number of...

In a large sample of customer accounts, a utility company determined that the average number of days between when a bill was sent out and when the payment was made is 26 with a standard deviation of 7 days. Assume the data to be approximately bell-shaped. Estimate the percentage of customer accounts for which the number of days is greater than 26.

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Answer #1

here as we know that for bell shaped data is symmetric and mean falls at point below and above which 50% values fall

therefore percentage of customer accounts for which the number of days is greater than 26=50.0%

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