Fundamentals of Statistics (5th Edition)
5th Edition
ISBN: 9780134508306
Author: Michael Sullivan III
Publisher: PEARSON
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Chapter B.2, Problem 10AYU
A simple random sample of size n is drawn from a population that is known to be
- (a) Construct a 95% confidence interval for σ2 if the
sample size , n, is 10. - (b) Construct a 95% confidence interval for σ2 if the sample size, n, is 25. How does increasing the sample size affect the width of the interval?
- (c) Construct a 99% confidence interval for σ2 if the sample size, n, is 10. Compare the results with those obtained in part (a). How does increasing the level of confidence affect the width of the confidence interval?
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(a) Estimate the factor effects. Plot the effect estimates on a normal probability scale.
(b) Identify a tentative model for this process. Fit the model and test for curvature.
(c) Plot the residuals from the model in part (b) versus the predicted resistivity. Is there any indication on
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(d) Construct a normal probability plot of the residuals. Is there any reason to doubt the validity of the
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Stem1: 1,4
Stem 2: 2,4,8
Stem3: 2,4
Stem4: 0,1,6,8
Stem5: 0,1,2,3,9
Stem 6: 2,2
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colgPA= 1.39+0.412 hsGPA
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Find the P value
Chapter B.2 Solutions
Fundamentals of Statistics (5th Edition)
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