Textbook: Applied Statistics in Business and Economics

Problem 9.38

The average weight of a package of rolled oats is supposed to be at least 18 ounces. A sample of 18 packages shows a mean of 17.78 ounces with a standard deviation of 0.41 ounce. (a) At the 5 percent level of significance, is the true mean smaller than the specification? Clearly state your hypotheses and decision rule. (b) Is this conclusion sensitive to the choice of ? (c) Use Excel to find the p-value. Interpret it.

Looking for:

H0:

H1:

Critical Value:

Test Statistic:

Decision:

Conclusion:

Is it sensitive to Alpha :

(Why / Why Not) :

Pvalue:

Interpret Pvalue: