Use the given information to find the number of degrees of​ freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2, and the confidence interval estimate of sigma .It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 80% ​confidence; n equals 27​, s equals 65.8.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Use the given information to find the number of degrees of​ freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2, and the confidence interval estimate of sigma .It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 80% ​confidence; n equals 27​, s equals 65.8.

 

a. df equals

​(Type a whole​ number.)

b. chi Subscript Upper L Superscript 2 equals 
​(Round to three decimal places as​ needed.)
 
C. chi Subscript Upper R Superscript 2 equals
​(Round to three decimal places as​ needed.)
 
D. The confidence interval estimate of sigma is less than sigma less than
​(Round to one decimal place as​ needed.)
Expert Solution
Step 1

As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted...

 

Given that

Sample size (n)=27

Sample standard deviation (s)=65.8

We have to find

a .df 

b..chi Subscript Upper L 

c..chi Subscript Upper R

 

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