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Rising FAX Costs

Chapter Exercises 9.54

Faced with rising FAX costs, a firm issued a guideline that transmissions of 10 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.

Claim: True mean greater than 10.
The level of significance of the test a =0.01

(a) State the null and alternative hypothesis symbolically.
Ho :
H1 :

(b) The value of the test statistic is found to be t=.5.90 At a=0.01, can it be concluded that the true mean is greater than 10 pages? Why or why not? Explain!

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Chapter Exercises 9.54

Faced with risinf FAX costs, a firm issued a guideline that transmissions of 10 or more should bw sent by 2-day mail instead. Wxceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax ...

Solution Summary

The solution examines rising FAX costs. The null and alternative hypothesis is determined.

$2.19