Assume the sample is from a normally distributed population and construct the indicated confidence intervals for (a) the population variance σ^{2} and

avissidep

avissidep

Answered question

2021-06-17

Assume the sample is from a normally distributed population and construct the indicated confidence intervals for (a) the population variance σ2 and (b) the population standard deviation σσ. Interpret the results. The diameters (in inches) of 18 randomly selected bolts produced by a machine are listed. Use a 95% level of confidence.
4.477 4.425 4.034 4.317 4.003 3.760 3.818 3.749 4.240 3.941 4.131 4.545 3.958 3.741 3.859 3.816 4.448 4.206

Answer & Explanation

stuth1

stuth1

Skilled2021-06-18Added 97 answers

Variance: (0.0426, 0.1698)
Standard deviation: (0.2063, 0.4121)

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