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 39 orders was selected,the average number of days was 6.65 with a population standard deviation of 1.5 days.Calculate the appropriate test statistic to test the hypotheses.

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The Answer of 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 39 orders was selected,the average number of days was 6.65 with a population standard deviation of 1.5 days.Calculate the appropriate test statistic to test the hypotheses.

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