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Question 569:

Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the right-tail p-value.

Need more than just an answer? Download the Easy t Excel T-test Calculator Package which gets you the answer with the detailed calculations.

Need help with the concepts in this question ? View the Comparing Two Means: 2 Sample t-test Tutorial.

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