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A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample of...

A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample of 70 cookies. The mean is 22.42 and the standard deviation is 2.44. Construct a 99​% confidence interval estimate of the standard deviation of the numbers of chocolate chips in all such cookies.

Math   Statistics-And-Probability   
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Answer #1

Given : Sample size=n=70

Sample standard deviation=s=2.44

Signiifcance level=

Now , the criitcal values are given by ,

The Excel function is , =CHIINV(0.005,69)

The Excel function is , =CHIINV(0.995,69)

Therefore , the 99% confidence  interval estimate of the standard deviation of the numbers of chocolate chips in all such cookies is ,

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