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02.11.2020 •
Mathematics
6. A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample
of 70 cookies. The mean is 22.47 and the standard deviation is 2.55. Construct a 90% confidence
Interval estimate of the variance of the number of chocolate chips in all such cookies.
(a) Find the critical value(s). (Round to three decimal places)
(b) Construct the confidence interval. (Round to three decimal places)
(c) Conclusion.
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Ответ:
A
Step-by-step explanation: