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The project manger of a software company requested an analysis of past performance. The assigned analyst compared actual labor with the initial estimate for 20 most recent projects. The results are X=actual-initial estimate (in thousands of hours) are as follows
15.2 7.2 0.1 10.9 2.5 14.1 4.8 -2.8 7.4 12.5
8.3 9.1 10.2 5.1 -4.2 6.0 13.2 3.8 18.1 5.5
a. Select an appropriate probability distribution and why
b. If X has a normal probability distribution what is the population mean and standard deviation
c. How musch would the estimate need to be changed so that there is a 50% chance of an overrun
Based on your analysis, how is the new bottling process working?
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If the mean systolic blood pressure is 130 and the standard deviation is 8, find the upper and lower readings that would qualify people to participate in the study.
If you draw one ball from the urn what is the probability that it is blue or white?
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