Consider a normal population distribution with the value of known. a. What is the confidence level
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a. What is the confidence level for the interval ± 2.81 σ/√n?
b. What is the confidence level for the interval ± 1.44 σ/√n?
c. What value of za/2 in the CI formula (7.5) results in a confidence level of 99.7%?
d. Answer the question posed in part (c) for a confidence level of 75%.
Distribution
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Probability And Statistics For Engineering And The Sciences
ISBN: 9781305251809
9th Edition
Authors: Jay L. Devore
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