The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of $3620. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance σ2 and the population standard deviation σ. Use a 90% level of confidence. Interpret the results.       What is the confidence interval for the population variance σ2​?   ​(enter your response here​,enter your response here​) ​(Round to the nearest integer as​ needed.)   What is the Standard Deviation.

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The annual earnings of
13
randomly selected computer software engineers have a sample standard deviation of
$3620.
Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance
σ2
and the population standard deviation
σ.
Use a
90%
level of confidence. Interpret the results.
 
 
 
What is the confidence interval for the population variance
σ2​?
 
​(enter your response here​,enter your response here​)
​(Round to the nearest integer as​ needed.)
 
What is the Standard Deviation.
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