For a sample of 10 observations drawn from a normally distributed population,we obtain the sample mean and the sample variance as 50 and 75,respectively.We want to determine whether the population variance is greater than 70.The critical value at a 5% significance level is
A) 1.645.
B) 3.325.
C) 9.642.
D) 16.919.

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The Answer of For a sample of 10 observations drawn from a normally distributed population,we obtain the sample mean and the sample variance as 50 and 75,respectively.We want to determine whether the population variance is greater than 70.The critical value at a 5% significance level is
A) 1.645.
B) 3.325.
C) 9.642.
D) 16.919.

For a Sample of 10 Observations Drawn from a Normally