A mail-order business is able to complete customers' orders within six calendar days or less on the average. Periodicall

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A mail-order business is able to complete customers' orders within six calendar days or less on the average. Periodicall

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A Mail Order Business Is Able To Complete Customers Orders Within Six Calendar Days Or Less On The Average Periodicall 1
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A mail-order business is able to complete customers' orders within six calendar days or less on the average. Periodically, the operations manager selects a random sample of customer orders and determines the number of days required to complete the orders. Based on this sample information, he decides if the required standard is not being met. He wishes to determine if the average number of days to complete customers' orders exceeds six days. On one occasion where a sample of 40 customers was selected, the average number of days was 6.65, with a sample standard deviation of 1.5 days.
Form appropriate hypotheses for the test above. A. Ho: 6 days HA: > 6 days < 6 days HA: μ ≥ 6 days B. Ho: C. Ho: > 6 days HA: US 6 days D. Ho: H26 days HA: μ< 6 days
Calculate the value of the test statistic. A. -18.74 B. -2.33 C. 2.74 D. 17.33
At 2.5% significance level, the decision is to A. do not reject Ho; we cannot conclude that the average number of days to complete customers' orders exceeds six days B. do not reject Ho; we can conclude that the average number of days to complete customers' orders exceeds six days C. reject Ho; we cannot conclude that the average number of days to complete customers' orders exceeds six days D. reject Ho; we can conclude that the average number of days to complete customers' orders exceeds six days
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