For a good driver, claim sizes are normally distributed with mean 1000 and variance 100000. For a bad driver, claim sizes are exponentially distributed with mean 2000. 80% of drivers are good. Calcula...
For a good driver, claim sizes are normally distributed with mean 1000 and variance 100000.
For a bad driver, claim sizes are exponentially distributed with mean 2000. 80% of drivers are good.
Calculate the variance of claim size for a driver seletected at random
ANSWER： 1040000
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For a good driver, claim sizes are normally distributed with mean 1000 and variance 100000. For a bad driver, claim sizes are exponentially distributed with mean 2000. 80% of drivers are good. Calcula...
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The heights of 1000 students are approximately normally distributed with a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. Suppose 200 random samples of size 25 are drawn from this population and the means recorded to the nearest tenth of a centimeter. Determine (a) the mean and standard deviation of the sampling distribution of X; (b) the number of sample means that fall between 171 and 177 cm.
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Assume the random variable x is normally distributed with mean u = 80 and standard deviation c=5. Find the indicated probability. P(65<x< 73) P(65<x< 73)=0 (Round to four decimal places as needed.) X 5.2.17 Use the normal distribution of SAT critical reading scores for which the mean is 507 and the standard deviation is 122. Assume the vari (a) What percent of the SAT verbal scores are less than 550? (b) If 1000 SAT verbal scores are randomly selected, about...
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