aianjie

 

The correct answer is A

The two-sided F-test is appropriate to test the equality of population variances. The decision rule is to reject H₀ if the computed test statistic, F, exceeds the critical F-value at α/2. For the information provided, F = [attach]13868[/attach]   = 36/25 = 1.44. At a 0.025 level of significance with d₁ = 35 and d₂ = 24, F-critical = 1.915. Since F < F-critical (1.44 < 1.915), we fail to reject the null hypothesis.

aianjie

 

4、The test statistic for an F-test of the equality of two sample variances is the:

A) product of the two sample variances.

B) ratio of the two sample standard deviations.

C) product of the two sample standard deviations.

D) ratio of the two sample variances.

aianjie

 

The correct answer is D

The test statistic for an F-test of the equality of two sample variances is the ratio of the two sample variances.

 

 

 

[attach]13869[/attach]

aianjie

 

5、What is the computed value of the test statistic that follows an F-distribution when sample variances are equal and the level of significance is 0.10?

A) 0.05.

B) 0.90.

C) 1.00.

D) 0.10.

aianjie

 

The correct answer is C

The calculated value of the F-distributed test statistic, F, is s12 / s22. With equal variances, F = 1.

maliya

顶

sarui

[em218]

binnu

[em50]

dobino

谢谢楼主的分享

shanshan_146

辛苦了！