What is the 90 percent confidence interval
A local health care company wants to estimate the mean weekly elder day care cost. A sample of 10 facilities shows a mean of $250 per week with a standard deviation of $25. What is the 90 percent confidence interval for the population mean?
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Independent tosses of a loaded coin for which p(H) = 1/4; p(T) = 3/4. Draw a histogram of its probability mass function and graph for its distribution function Fx. Also find E(x).
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