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# 08ffx - Exam ADM 2303 COURSE TITLE Statistics for...

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(20) Question 1 An automobile dealership records the number of cars sold each day, and calculates the probability distribution as follows: N umber of cars sold daily Probability 0 0.1 1 0.11 2 0.2 3 0.23 4 0.3 5 0.06 (6) (a) Find the mean, variance, and standard deviation of the number of cars sold in one day. Mean = ------------------------------------ Variance = --------------------------------- Standard deviation = --------------------- (6) (b) Find the mean, variance, and standard deviation of the number of cars sold in total during 2 days, assuming sales on the 2 days are independent of each other. Mean = ------------------------------------ Variance = --------------------------------- Standard deviation = --------- 1.99 ------------ (8) (c) Find the mean, variance, and standard deviation of the number of cars sold in total during 2 days, assuming sales on the 2 days are correlated, with a correlation coefficient = 0.52. Mean = ------------------------------------ Variance = --------------------------------- Standard deviation = --------------------- 2
(20) Question 2 Statistics Canada provides data on the number of reportable transport accidents involving dangerous goods in their Table 4090002. In a recent year the average rate of occurrence of such accidents was 8.15 per week.

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08ffx - Exam ADM 2303 COURSE TITLE Statistics for...

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