Generating function for a random variable
The moment generating function for a random variable X is given by Mx(t) = (1/4)+ (3/4)*(1/(1-t)), t>1. Determine formulas for the density function and distribution function. Sketch graphs for fx and Fx.
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What proportion of the time is he up because of his dog? What proportion of the time does he actually spend sleeping
When a survey calls residential telephone numbers at random, only 36% of the calls reach a live person. You watch the random dialing machine make 17 calls.
Suppose you want to compare the amount of credit card debt for males and females. The null hypothesis for this problem would be no difference in the mean amount of credit card debt for males and females and the alternate hypotheses would be that t
In a recent survey of 1000 U.S adults, 19% are concerned that their taxes will be audited by the Internal Revenue Service. The surveys margin of error is plus or minus 3%. Translate the statement into a confidence level for P.
If you collect data at any ONE restaurant, the correlation between the amount of food served per person and the price paid for it should be:
Using a 0.01 significance level, test the inspectors claim that the company is cheating customers against the null that the mean weight is not less than 500 grams
Consider again the study of the association between depression and cardiac disease survivability, which showed that of the 361 patients with no depression, 67 died. Of the 89 patients with minor or major depression, 26 died.
A preliminary behavioral sutdy of the jingdong black gibbon, a primate endemic to the wuliang mountains in china, found that the mean song bout duration in the wet season is 12.59 mintues with a standard deviation of 5.31 miutes. assuming that son
How many different linear arrangements are there of the letters A, B, C, D, E for which:
In a two-tailed hypothesis test, the test statistic is determined to be z = -2.5. The p-value for this test: Why?
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