A mail-order business prides itself in its ability to fill customers' orders in less than six calendar days, on average. Periodically, the operations manager selects a random sample of customer orders and determines the number of days required to fill the orders. On one occasion when a sample of 30 orders was selected, the average number of days was 6.65 with a sample standard deviation of 1.5 days. Assume the time in which an order is filled is normally distributed.

-What is the critical value to test the hypotheses at ? = .10.
A)-1.282
B)-1.96
C)-1.311
D)1.282
E)1.311

Question

A mail-order business prides itself in its ability to fill customers' orders in less than six calendar days, on average. Periodically, the operations manager selects a random sample of customer orders and determines the number of days required to fill the orders. On one occasion when a sample of 30 orders was selected, the average number of days was 6.65 with a sample standard deviation of 1.5 days. Assume the time in which an order is filled is normally distributed.

-What is the critical value to test the hypotheses at ? = .10.

-What is the critical value to test the hypotheses at ? = .10.
A)-1.282
B)-1.96
C)-1.311
D)1.282
E)1.311

Quizplus · Accepted Answer

The Answer is C

A Mail-Order Business Prides Itself in Its Ability to Fill