In a large sample of customer accounts, a utility company determined that the average number of days
Question:
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
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry