Question
The retail price for 10 randomly selected agriculture books are shown in the table. Assume that...
The retail price for 10 randomly selected agriculture books are shown in the table. Assume that the population is normally distributed. Construct a 95% confidence interval for the standard deviation. (Note: s=5.766.)
|
63.38 |
66.66 |
64.09 |
68.09 |
69.54 |
61.71 |
77.64 |
74.85 |
74.72 |
62.12 |
The 95% confidence interval is from to .
What are the intervals?
(Round to three decimal places as needed.)
Homework Answers
Answer #1
Chi square critical values at 0.05 level with 9 df = 2.700 , 19.023
95% confidence interval for 
is
sqrt [(n-1) S2 / 
/2] <
< sqrt [(n-1)
S2 / 1-/2 ]
sqrt [9 * 5.7662 / 19.023 ] < < sqrt [
9 * 5.7662 / 2.700]
3.966 < < 10.527
95% CI is ( 3.966 , 10.527 )
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