# Question

State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test the following claims:
a. The variances of populations A and B are not equal.
b. The standard deviation of population I is larger than the standard deviation of population II.
c. The ratio of the variances for populations A and B is different from 1.
d. The variability within population C is less than the variability within population D.

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