# Question: In the past the standard deviation of weights of certain

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.

a. Solve using the p-value approach.

b. Solve using the classical approach.

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