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Question: 1. The expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 6. What is the probability that the project will

(a) require at least 17 months?

(b) be completed within 20 months?

(d) be completed within 25 months?

2. The Coogan Construction Company has determined that the expected completion time for its most popular model home follows the normal probability distribution with a mean of 25 weeks and a standard deviation of 4 weeks.

(a) What is the probability that the next home will be completed within 30 weeks?

(b) What is the probability that the next home will be completed within 22 weeks?

(d) Find the number of weeks within which Coogan is 85% sure the next home will be completed.

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Statistics and Probability, Statistics

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