The following are the measures based on independently drawn samples from normally distributed populations:
Sample 1: 
= 345,and n1 = 25
Sample 2: 
= 276,and n2 = 21
A)Construct a 90% interval estimate of the ratio of the population variances.
B)Test if the ratio of the population variances differs from 1,using the computed confidence interval,at the 10% significance level.
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