Essay
A random sample of 21 pages is used to estimate the population variance of the number of typographical errors in a book. The sample mean and sample standard deviation are calculated as 7.34 and 5.11, respectively. Assume that the population is normally distributed.
A) Construct a 95% interval estimate of the population variance.
B) Construct a 99% interval estimate of the population variance.
C) Use your answers to discuss the impact of the confidence level on the width of the interval.
Correct Answer:
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a. [15.28, 54.45]
b. [13.06, 7...View Answer
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Correct Answer:
Verified
b. [13.06, 7...
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
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