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) State the appropriate null and alternative hypotheses
a) State the appropriate null and alternative hypotheses
iii) Find the p-value. (Give your answer bounds exactly.)