2710 001 FINAL A FALL 09 SOLUTIONS

# What is the probability of randomly selecting a

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6. What is the probability of randomly selecting a female that is > 45? A. 0.400 B. 0.050* C. 0.250 D. 0.500 7. Given the person is male; what is the probability that he is < 30? 8. What is the probability of a person selected at random being female OR 30-45 ?

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For problems 9, 10 &11 use the Following: For analyzing the amount of water used to water a garden the following weekly measurements were taken (100’s of gallons) along with a partial table of Descriptive Statistics: DATA: 12, 14, 11, 16, 17, 15, 21 and 23 Gallons(00) Mean Standard Error 1.46917 7 Median 15.5 Mode #N/A Standard Deviation Sample Variance Kurtosis - 0.52966 Skewness 0.59900 5 Range 12 Minimum 11 Maximum 23 Sum 129 Count 8 9. The sample mean is: 10. The sample standard deviation is: A. 2.28 B. 5.50 C. 4.16* D. 3.12 11. The 80 th Percentile is
For problems 12 through 14 use the following information: A lawyer estimates that 40%  of the cases in which she represented the defendant were won. The lawyer is presently  representing 12 defendants in different cases.  Assume all the cases are independent  events. 12. What is the probability that she will win exactly 5 cases ? 13. What is the probability that she will win 4 or less ?

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