Compute the mean absolute deviation for the preparation time in Problem 4.7. The sample mean was determined to be 10.9min Problem 4.7 A work-standards expert observes the amount of time required to...

Compute the mean absolute deviation for the preparation time in Problem 4.7. The sample mean was determined to be 10.9min

Problem 4.7

A work-standards expert observes the amount of time required to prepare a sample of 10 business letters in an office with the following results listed in ascending order to the nearest minute: 5, 5, 5, 7, 9, 14, 15, 15, 16, 18.