# Test of hypothesis

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.

https://brainmass.com/statistics/hypothesis-testing/test-of-hypothesis-162384

#### Solution Preview

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 ...

#### Solution Summary

Tests the hypothesis that at the .01 level of significance, the true mean is greater than 10. Also finds the right-tail p-value using Excel.