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Let (X,Y) be jointly distributed random variables with joint density f(x,y)=1/9 for 0<=x<=3 and 0<=y<=x^2
Determine f(X=x given Y=2)
We want to estimate the population mean within 5, with a 99 percent level of confidence. The population standard deviation is estimated to be 15. How large a sample is required?
the probability that it gets by the first inspector is 0.1. Of those that get past the first inspector, the second inspector will miss 5 out of 10. What fraction of the defective items gets by both inspectors?
a machine consists of two components whose lifetimes have the joint density function fxy 150 for xgt0 ygt0 xylt10. the
Calculate the population mean and population standard deviation.
\Write down the general formula for the discrete uniform probability distribution function. Now write down the probability distribution function for the random drawing of tile numbers. Is this a discrete uniform distribution?
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
When there is more than two predictors, one can no longer graph the tted surface in the usual way. How then does one make sense of a surface in more than three dimensions?
A jar contains 2 black marbles and 8 white marbles. If you randomly pick 2 marbles without replacement, what is the probability that you get one marble of each color?
If an individual is selected, find the probability that the individual's pressure will be between 120 and 121.8 mm Hg. Why is the answer to Part a so much smaller than the answer to Part b?
For a hypothesis test about a population proportion or mean, if the level of significance is less than the p-value, the null hypothesis is rejected.
The outcomes that you would expect from a die that is perfectly fair and unbiased. Does the loaded die appear to differ significantly from a fair die that has not been "loaded?"
Find the minimum sample size required for estimating the overall proportion of students who passed Exam P in 2009 to within 4% with 95% confidence if it is known that this proportion is between 30% and 40%.
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