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Suppose the cumulative distribution function of the random variable X is F(x) = 0 when x<-2 , F(x) = .25x + .5 when -2 <= x < 2 and F(x) = 1 when 2<=x (<= means greater than or equal). Determine the following a. P(X<1.8) b. P(X>-1.5) c. P(X<-2) d. P(-1<X<1)
Analysis of weekly widget production reveals that the number of widgets X produced in a week is a random variable with mean μX = 200 and standard deviation σX = 20. What are the mean and the standard deviation of C?
All the pupils took the same achievement test, and the means for groups receiving different methods were compared. What was the dependent variable?
Develop a research question, testable hypothesis, confidence level, and degrees of freedom. Draw the appropriate conclusions with respect to female and male human resource manager salary levels.
a prestigious university requires a score of at least 750 on a graduate exam for admission to its mba program. suppose
Why should you use ANOVA instead of several t tests to evaluate mean differences when an experiment consists of three or more treatment conditions?
Industry standards recommend that 9 percent of new vehicles need warranty service in the first year. Determine the probability that none of these vehicles needs warranty service?
As part of an opinion survey, a simple random sample of 1,500 families is chosen. What is the chance that between 9% and 11% of the sample families will not own cars?
any conclusion drawn for the t-test statistical process is only as good as the research question asked and the null
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
A humane society claimes that less than 36% of U.S. households own a dog. In a random sample of 396 U.S. households, 151 say they own a dog. At x=0.04, is there enough evidence to support the society's claim?
a young boy asks his mother to get five game-boy cartridges from his collection of 10 arcade and 5 sports games. how
let x be binaomial with parameters n 15 and p .2a find the expression for the density for xb find the expression for
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