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Suppose X1 ~ U(0,1) and X2 ~ U(0,1). It can be shown that Y=X1/X2 and Z=X1*X2 have joint density function given by f(y,z) = 1/2y for y>z>0 and yz<1. Find the marginal densities of Y and Z (don't forget the state space).
Scores on a test are normally distributed with a mean of 60.9 and a standard deviation of 12. Find P81, which separates the bottom 81% from the top 19%.
consider the following. enter your answers to four decimal places.a find the level of confidence assigned to an
find the 95 confidence interval for the difference between two means based on this information about two samples.
a. What is the mean of the sampling distribution?
Compute the Spearman rank correlation coefficient and test for the existence of a population correlation.
What sample size is needed if they wish to be within 5 percentage points of the actual?
In summer 2000, a growing number of warranty claims on Firestone tires sold on Ford SUVs prompted Firestone and Ford to issue a major recall. An analysis of warranty-claims data helped identify which models to recall.
The thickness of photoresist applied to wafers in semiconductor manufacturing at a particular location on the wafer is uniformly distributed between 0.2050 and 0.2150 micrometers.
Plot the ACF and PACF of the transformed time series.Examine these plots for non-stationary.If appropriate difference the data and seasonality difference the data.(Note this di=etermines d and D in the ARIMA(p,d,q)s model.
question suppose studies have shown that approximately 20 .2 of americans regularly engage in exercise at least 3 times
the following two acceptance rules are being considered for determining whether to take delivery of a large shipment of
Determine the Conclusion: Assume that you obtained a p-value less than your selected value for alpha, provide a conclusion about your research hypothesis.
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