MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Use the given information to find the number of degrees of​ freedom, the critical values χ2L and χ2R​, and the confidence interval estimate of σ. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 98​% ​confidence; n=22​, s=65.2.
 
df=
(type a whole number)
 
X2/L= 
(round to three decimal places as needed)
 
X2/R=
(round to three decimal places as needed)

The confidence interval estimate of σ is __ < σ  < __. 

(round to one decimal place as needed)

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Step 1: degrees of freedom
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Step 2: Find chi-square distribution critical values
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Step 3: Confidence interval for the population standard deviation
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