Question

Exhibit 10-4
Use the following information and the PopMeanDiff template to answer the following about two samples of women and their ages when their first child turned 16 years old. Population variance and standard deviations are unknown.

​

   
Sample 1

Sample 2

Sample mean  
45

42

Sample variance  
85

90

Sample size  
10

12

​

Refer to Exhibit 10-4. The 95% confidence interval for the difference between the two population means is _____.
Question 1 options:

–5.367 to 11.367

–5 to 3

–4.86 to 10.86

–2.65 to 8.65
Question 2 (1 point)
Exhibit 10-4
Use the following information and the PopMeanDiff template to answer the following about two samples of women and their ages when their first child turned 16 years old. Population variance and standard deviations are unknown.

​

   
Sample 1

Sample 2

Sample mean  
45

42

Sample variance  
85

90

Sample size  
10

12

​

Refer to Exhibit 10-4. The standard error of is _____.
Question 2 options:

3.0

4.0

8.372

19.48
Question 3 (1 point)
Exhibit 10-4
Use the following information and the PopMeanDiff template to answer the following about two samples of women and their ages when their first child turned 16 years old. Population variance and standard deviations are unknown.

​

   
Sample 1

Sample 2

Sample mean  
45

42

Sample variance  
85

90

Sample size  
10

12

​

Refer to Exhibit 10-4. The point estimate for the difference between the means of the two populations is _____.
Question 3 options:

0

2

3

15
Question 4 (1 point)
Exhibit 10-4
Use the following information and the PopMeanDiff template to answer the following about two samples of women and their ages when their first child turned 16 years old. Population variance and standard deviations are unknown.

​

   
Sample 1

Sample 2

Sample mean  
45

42

Sample variance  
85

90

Sample size  
10

12

​

Refer to Exhibit 10-4. The degrees of freedom for the t distribution are _____.
Question 4 options:

22

21

20

19

Answer 1