Q 60

The result of placing a larger sample variance in the numerator of the test statistic allows us to
A) focus only on the right tail of the distribution.
B) arrive at a more accurate statistic value.
C) focus only on the left tail of the distribution.
D) determine if the distribution is symmetric.

Q 61

Construct a 95% confidence interval for the ratios of two population variances.The random samples of n_{1 }= 9 and n_{2 }= 11 with sample variances of = 500 and = 250,respectively.Assume that the samples were drawn from a normal population.
A) [0.50,2.00]
B) [0.52,8.60]
C) [0.25,1.41]
D) [0.44,4.30]

Q 62

The following are the competing hypotheses and the relevant summary statistics . . Which of the following statements is correct,regarding the assumptions for conducting the hypothesis test?
A) The samples are drawn from not normally distributed population.
B) The samples are dependent and taken from normally distributed population.
C) The difference of the sample variances is used to test the hypotheses.
D) The samples are independent and taken from normally distributed population.