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## Statistics

Inverse probability based on the normal distribution.

1. In a random sample of eight military contracts involving cost overruns, the following information was obtained. x = big price of the contract (in millions of dollars) and y = cost of overrun (expressed as a percent of the bid price).

 x 6 10 3 5 9 18 16 21 y 31 25 39 35 29 12 17 8

If an overrun contract was bid at 12 million dollars, what does the least-squares line find out for the cost of overrun (as a percent of bid price)?

2. Let x be a random variable that represents the length of time it takes a student to prepare a term paper for Dr. Adam's Sociology class. After interviewing many students, it was found that x has an approximately normal distribution with mean μ = 6.8 hours and standard deviation σ = 2.1 hours. 0 ≤ z ≤ 2

Statistics and Probability, Statistics

• Category:- Statistics and Probability
• Reference No.:- M919958

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