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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 days. Assume the data to be approximately bell-shaped.

Between what two values will approximately 68% of the numbers of days be?
Approximately 68% of the customer accounts have payment made between __
and ____ days.

User Bondt
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Answer: 95

Explanation:

User BIBD
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