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Suppose the conditional distribution of Y given X = x is Gamma with ? = 4 and ? = 1/x and the marginal distribution of X is exponential with mean 2 a)Find the conditional mean and variance of Y given X = x. b)Using the results from (a), nd the mean and variance of Y. c)Find the correlation coecient of X and Y.
if a study had a result of f 2 147 4.56 p 0.003 how many groups were in the study and what was the sample
Normally distributed with a mean of $ 1750 and a standard deviation of 300. What's the probability that a randomly selected state has a per capita GNP at or below $950?
A snack company distributes chips in bags labeled 6 ounces. The local Bureau of Weights and Measures randomly selects 50 bags of chips and obtains a sample mean of 5.9 ounces.
What is the expected number of crimes that will be solved? What is the standard deviation?
Create and apply the equation that would best allow you to compare the performance of the sources - What is the total cost of the item plus sales tax?
a parcel service randomly selected 48 packages it received. the sample has a mean weight of 18.6 pounds. assume that
supposed that a b and c are mutually independent events and that pa0.5 pb0.8 and pc0.9. find the probabilities that
A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking.
suppose you have a big vat of balls and that 70 of the balls are green and 30 of the balls are red. suppose you
calls to a customer service center last on average 1.8 minutes with a standard deviation of 1.5 minutes. an operator in
The percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence level.
Critically the difference between Paramaeter and Statistics and Critically discuss the concept of operationalize? What are focus groups
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