Question

The following data represent the age​ (in weeks) at which babies first crawl based on a survey of 12 mothers. The data are normally distributed and s=9.366 weeks. Construct and interpret a 95​% confidence interval for the population standard deviation of the age​ (in weeks) at which babies first crawl. 49 31 43 34 39 25 46 35 55 26 37 29 Click the icon to view the table of critical values of the​ chi-square distribution.

Select the correct choice below and fill in the answer boxes to complete your choice. ​(Use ascending order. Round to three decimal places as​ needed.)

A. If repeated samples are​ taken, 95​% of them will have the sample standard deviation between nothing and nothing.

B. There is a 95​% probability that the true population standard deviation is between nothing and nothing.

C. There is 95​% confidence that the population standard deviation is between nothing and nothing.

Answer 1

the sample values as shown in the table below:

Observation:	X
1	49	2401
2	31	961
3	43	1849
4	34	1156
5	39	1521
6	25	625
7	46	2116
8	35	1225
9	55	3025
10	26	676
11	37	1369
12	29	841
Sum =	449	17765

C. There is 95​% confidence that the population standard deviation is between

Please do upvote if you are satisfied! Let me know in the comments if anything is not clear. I will reply ASAP!