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An insurance company has 10,000 automobile policyholders. The expected yearly claim per policy holder is $240 with a standard deviation of $800. Approximate the probability that the yearly claim exceeds $2.7 million.
Assume that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters will yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion.
Half of the 1000 emloyees were involved in some type of exercise. What is the probability that an employee will have a cold next year?
components used in a cellular telephone are manufactured with nominal dimension of .3 mm and lower and upper
the distribution of heights of adult men in the u.s. is approximately normal with mean 69 inches and standard deviation
Conduct a hypothesis test to see whether the returns for mid-cap growth funds over the same period are significantly different from the average for U.S. Diversified Equity funds.
there are 3 coins in a box. the probability of getting head is 23 for two of them while for remaining it is 12. a coin
Calculate for Alpha, Beta, and the Effect size?
A rental agent claims that the mean monthly rent, mu, for apartments on the east side of town is less than $725. A random sample of 13 monthly rents for apartments on the east side has a mean of $724, with a standard deviation of $15.
Dr. Justin Case wants to explore whether or not students perform better if they cram for a test (massed practice) or if they space their studying over weeks (distributed practice).
Examine the data below showing the weights (in pounds) of randomly selected checked bags for an airline's flights on the same day. (a) At α = .05, is the mean weight of an (a) At α = .05, is the mean weight of an international bag greater? Show the h..
If the manufacturer wants to keep the mean at 12.8 ounces but adjust the standard deviation so that only 2% of the bags weigh less than 12 ounces, how small must that standard deviation be?
do one of the following as appropriate a find critical value za2 b find critical value ta2 c state that neither
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