2639智慧树知到《商务统计》见面课答案答案841

题目描述

智慧树知到《商务统计》见面课答案,智慧树 知到 见面课答案 商务统计的答案如下：
智慧树知到《商务统计》见面课答案
见面课：常见的假设检验及区间估计（双总体及多总体）

1、问题: One rule that must always be followed in constructing frequency distributions is that __.

选项：

A:adjacent classes must not overlap

B:the midpoint of each class must be a whole number

C:the width of each class is equal to the range

D:the number of intervals must be an odd number

答案: 【adjacent classes must not overlap】

2、问题:image.png

选项：

A:are established correctly

B:are not mutually exclusively

C:are not collectively exhaustive

D:don not reference a population parameter

答案: 【are not collectively exhaustive】

3、问题:When a false null hypothesis is not rejected, the researcher has made a

选项：

A: type II error.

B: sampling error.

C:powerful error.

D: type I error

答案: 【 type II error.】

4、问题:image.png

选项：

A:image.png

B:image.png

C:image.png

D:image.png

答案: 【image.png】

5、问题:Which of the following is an appropriate null hypothesis?

选项：

A:image.png

B:image.png

C:image.png

D:image.png

答案: 【image.png】

6、问题:In what type of test is the variable of interest the difference between the values of the observations rather than the observations themselves?

选项：

A:a test for the equality of variances from 2 independent populations

B:a test for the difference between the means of 2 related populations

C:a test for the difference between the means of 2 independent populations

D:All of the above

答案: 【All of the above】

7、问题:The test for the equality of two population variances is based on the

选项：

A:ratio of the two sample variances

B:difference between the two sample variances

C:difference between the two population variances

D:difference between the sample variances divided by the difference between the sample means

答案: 【ratio of the two sample variances】

8、问题:image.png

选项：

A:zero.

B:-0.5.

C:0.5

D:one.

答案: 【0.5】

9、问题:image.png

选项：

A:t distribution with 73 degrees of freedom[1] [2] [3] [4]  下一页