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Let X and Y be independent and identically distributed random variables with common standard normal pdf of
f(z) = (1/sqrt(2*pi))*e^((-z^2)/2)) , -infiniti < z < +infiniti
Let U=X+Y and V=X^2+Y^2 . Find the joint moment generating function of U and V?
45 percent households say they would feel secure if they had $50,000 in savings. you randemly select 8 households and ask them if they would feel secure if they had $50000in savings
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
A company's headquarters is located in downtown Chicago. The company is interested to know the mean driving time of its employees if they require their employees to start working at 6:00 am. Fifty employees are randomly sampled over four weeks and..
About 68% of the students at fairview community college favor a new policy regarding parking on campus. suppose that we are interested in the proportion of 45 students in a math class who favor the policy.
Assume that results of survey were used to create seperate 99% confidence intervals for boys and girls. would the margins of error be same as, larger , or smaller than that for question one?
what is the difference between significance level and a p-value? explain in
IQ tests generally have scores in which the mean is 100, and the standard deviation is 16. If your IQ score was 134, what percentage of the population would have a higher IQ than you?
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
What is the correlation between x3 and x2 and what is the pdf of x?
American youngsters aged 6 to 19, 15% were seriously overweight. Calculate and interpret a confidence interval using a 99% confience level for the proportion of all american youngsters.
To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is capable to break free from the cuffs. What type of sampling techniq..
A number of years ago, there was a popular television game show called Let's Make a Deal. The host Monty Hall, would randomly select contestants from the audience and, as the title suggests
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