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Suppose X and Y have the same mean and have the same variance. Suppose also X and Y are independent. Then
E((X-Y)^2) = 2Var(X)
-Explain at least two (2) possible reasons for the differences between the results of exploration and trade by the Chinese and by the European states.
A loan application is received during the day. By hand: Find the probability that the amount requested amount is $90,000 or more? Find the probability that the amount requested is between $75,000 and $90,000?
Find the z-scores that correspond to the percentage of adult spider that have carapace length of 15 mm and 16 mm
An occupational health study was carried out to evaluate the health status of workers. The response is forced expiratory volume (FEV), a measure of respiratory function
A medical researcher estimates that no more than 55% of US adults eat breakfast every day. In a random sample of 250 US adults, 56.4% say that they eat breakfast every day. At 0.01 level of significance, is there enough evidence to reject the re..
At the .01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
Let X1,..., Xn be a random sample from a two-parameter exponential population with density 1 f (x, θ, υ) = θ e-(x-υ) θ , for x ≥ υ, θ > 0. Find MLEs for θ and υ when both are unknown.
let x be the age in years of a car driver and let y be the percentage of all accidents for a given age due to speeding.
the z-score for a particular number x is -1.25 where the values have a mean of 175.0 and a standard deviation of 12.0.
in a study of pregnant women and their ability to correctly predict the sex of their baby 59 of the pregnant women had
The carpeting department supervisor claims that the average number of days between the receipt of a complaint and its resolution is 20 days or less.
Suppose that researchers suspected that the effectiveness of the gastric freezing treatment might depend on whether a patient had recently developed the peptic.
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