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 30 with a standard deviation of 6 days. Assume the data to be approximately bell-shaped.

Between what two values will approximately 95% of the numbers of days be?

Estimate the percentage of customer accounts for which the number of days is between _______and________ . Estimate the percentage of customer accounts for which the number of days is between 24 and 36.

_______________ of the customer accounts have payment made between 24 and 36 days

Approximately 68%

Approximately 95%

Approximately 75%

Approximately 88.9%

Almost all