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ABC auto insuraance classifies drivers as good, medium, or poor risks. Drivers who apply fall under these three groups in proportations: 30 percent, 50 percent and 20. The probability of a good driver having a accident is .01, probability of a medium driver having a accident is .03 and the probability of a poor driver having a accident is .10. The company sells Mr. Brophy an insurance policy and he has an accident. What's the probability of Mr. Brophy being a good, medium or poor driver?
The payouts for the Powerball lottery and their corresponding odds arean probabilities of occurrence are shown below. The price of a ticket is $1.00. Find the mean and standard deviation of the payout.
You have two unbiased estimates, e 1 and e 2 , of a quantity with variances V 1 and V 2 respectively, and covariance Cov {e1,e 2 } = C. Form a new unbiased estimate:
What is the probability that a randomly selected fertilized egg hatches in less than 19 days? (Round to four decimal places as needed).
A 2005 study found that 202 women held board seats out of a total of 1,195 seats in the Fortune 100 companies. A 2003 study found that 779 women held board seats out of a total of 5,727 seats in the Fortune 500 companies.
Assume the standard deviation is $160 and that the amount spent is normally distributed. What is the probability that the amount spent on a randomly selected child is more than $700?
We want to test the hypothesis that population B has a smaller variance than population A.
Each organization gets a 90% confidence interval. About how many of these intervals should cover the population average?
A sample of 45 overweight men participated in an exercise program. At the conclusion of the program 32 had lost weight. At the .05 significance level, can we conclude the program is effective?
At the .05 level of significance, is there evidence of a difference in the mean ontime percentages for the 25 airports between September 2009 and September 2010?
A professor in the accounting department of a business school claims that there is much more variability in the final exam scores of students taking the introductory accounting course who are not majoring in accounting than for students taking the..
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Evaluate and discuss the following hypothesis based on what you have learned about hypothesis statements. Should they be written differently, or are the sufficient the way they are stated?
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