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OpenStudy (anonymous):
An oatmeal manufacturer wants to test the claim that the standard deviation of the amount of oatmeal in a box is 18 grams. Assume that the amount of oatmeal in a box is normally distributed. 24 boxes of oatmeal are selected at random. These 24 boxes have a standard deviation (of the amount of oatmeal in a box) of 14 grams. At a level of significance of 0.05, is there enough evidence to reject the manufacturer's claim?
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