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

question 130

Multiple Choice

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 sample standard deviation of 1.5 days.What is the critical value for $\alpha$ = .10 to test the hypotheses.

• A)-1.28
• B)-1.96
• C)-2.33
• D)1.28
• E)1.96

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Definitions:

Household Members

Individuals who reside in the same dwelling, sharing living accommodations and possibly familial or economic ties.

Seller's Warranties

Guarantees made by a seller regarding the condition, quality, or performance of a product.

Implied Warranty of Merchantability

A legal assurance that goods sold meet minimum quality standards and are fit for the purpose sold.

Trade Usage

Established practices or patterns of behavior regularly observed and accepted in a particular industry.