A random sample of n 5 15 heat pumps of a certain type yielded the following observations
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2.0 1.3 6.0 1.9 5.1 .4 1.0 5.3
15.7 .7 4.8 .9 12.2 5.3 .6
a. Assume that the lifetime distribution is exponential and use an argument parallel to that of Example 7.5 to obtain a 95% CI for expected (true average) lifetime.
b. How should the interval of part (a) be altered to achieve a confidence level of 99%?
c. What is a 95% CI for the standard deviation of the lifetime distribution?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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Related Book For
Probability And Statistics For Engineering And The Sciences
ISBN: 9781305251809
9th Edition
Authors: Jay L. Devore
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