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For the observations21, 36, 42, 24, 25, 36, 35, 49, 32
verify that the sample mean, 20% trimmed mean, and median are X¯ = 33.33, X¯ t = 32.9, and M = 35.
the claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35 and the sample
The average gas mileage of a certain model car is 29.0 miles. If the gas mileages are normally distributed with a standard deviation of 0.6 miles per gallon, find the probability that the car has a gas mileage of between 28.8 and 29.2 miles per ga..
Is it reasonable to conclude that this set of n = 16 people is not a representative sample of registered voters?
body mass index for newborns follows a normal distribution with a mean of 14 and standard deviation of .95. a doctor
according to a survey 62 of murders committed last year were cleared by arrest or exceptional means. fifty murders
the table below shows lifetime peptic ulcer rates per 100 population u for various family incomes x as reported by the
How large a sample should she check in order to be 90% confident that the true proportion is estimated to within 1.5%?
Statistics Questions Set: If the mean number of hours of television watched by teenagers per week is 12 with a standard deviation of 2 hours, what proportion of teenagers watch 16 to 18 hours of TV a week? (Assume a normal distribution.)
the time required to assemble an electronic component is normally distributed with a mean and standard deviation of 16
a purse contains 101 in anthony dollars and 1 in pennies. smith is allowed to draw and keep coins one at a time until
An investor invests in 40% of his money in stock A and 60% of his money in stock B, what is his portfolio's expected return? What is his portfolio's variance and standard deviation?
CAPM and Expected return. If the risk-free rate is 6 percent and the expected rate of return on the market portfolio is 14 percent, is a security with a beta of 1.25 and an expected rate of return of 16 percent overpriced or under priced?
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