Use the information given in the following paragraph to answer the four question

Question

Use the information given in the following paragraph to answer the four questions that follow Several customers of Delta Paint Factory complained that the 1 qt. (quart) cans of Reveal paint (outdoor, low odor) they purchased are underweight upon receipt from the factory. Delta Paint Factory management is looking into this issue and randomly selects 400 cans of Revenl paint to measure their weights. The sample average weight is 30 oz. At the 0.10 level of significance, is there sufficient evidence to conclude that the 1 qt. cans of Reveal paint are underweight? Assume the population standard deviation is known to be 2 oz., and that 1qt.-32 0z 1. What is the alternative hypothesis for testing whether the 1 qt. cans of paint are underweight? II.?? 1.645 B. Z> 1.282 C. Z

Explanation / Answer

Solution1:

Given population mean=32

population stdddev=64 oz

H0mu=32

H1:mu<32

ALTERNATIVE HYPOTHESIS IS

H1:mu<32

option C

left tail test

Solution2:

alpha=0.10

z alpha/2=-1.645

OPTION D

Solutio13:

H0:

All the 3 group means are equal.

OPTION C

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