We found xo.025 - 23.337 and xo.975 - 4.404. Recall the sample standard deviation s = 12.95, and sample size n - 13. Substitute these values to first find the lower bound for the confidence interval of the population variance, rounding the result to three decimal places. (n – 1)s2 xa/2 (13 - 1)12.952 lower bound - Now substitute these values to find the upper bound for the confidence interval of the population variance, rounding the result to three decimal places. (n – 1)s2 upper bound - X1- a/2 (13 – 1)12.952 Therefore, a 95% confidence interval for the population variance for the underpricing-overpricing indicator is to

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Step 3
We found xo 025 = 23.337 and x975 = 4.404. Recall the sample standard deviation s = 12.95, and sample
2
0.975
size n = 13.
Substitute these values to first find the lower bound for the confidence interval of the population variance,
rounding the result to three decimal places.
(n – 1)s?
2
lower bound
(13 – 1)12.952
Now substitute these values to find the upper bound for the confidence interval of the population variance,
rounding the result to three decimal places.
(n - 1)s2
upper bound =
X1- a/2
(13 – 1)12.952
Therefore, a 95% confidence interval for the population variance for the underpricing-overpricing indicator is
to
Transcribed Image Text:Step 3 We found xo 025 = 23.337 and x975 = 4.404. Recall the sample standard deviation s = 12.95, and sample 2 0.975 size n = 13. Substitute these values to first find the lower bound for the confidence interval of the population variance, rounding the result to three decimal places. (n – 1)s? 2 lower bound (13 – 1)12.952 Now substitute these values to find the upper bound for the confidence interval of the population variance, rounding the result to three decimal places. (n - 1)s2 upper bound = X1- a/2 (13 – 1)12.952 Therefore, a 95% confidence interval for the population variance for the underpricing-overpricing indicator is to
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