= Suppose two independent random samples of sizes n1 9 and n2 = 7 that have been taken from two normally distributed populations give sample standard deviations of s1=10 and s2=4,47. Suppose α=0,05. a- Test the alternative hypothesis that two variances are not equal to each other. What do you conclude? b- What is the test statistic F? c- what is the cricatal value F?

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