Question

In the past the standard deviation of weights of certain 32.0-oz packages filled by a machine was 0.25 oz. A random sample of 20 packages showed a standard deviation of 0.35 oz. Is the apparent increase in variability significant at the 0.10 level of significance? Assume package weight is normally distributed.
a. Solve using the p-value approach.
b. Solve using the classical approach.


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  • CreatedAugust 28, 2015
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