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The random variables X and Y each take values -1 and 1, and p(X=1)=a, P(Y=1)=b. Suppose Z=XY and that X, Y and Z are pairwise independent. What are the values of a and b? are {X,Y,Z} independent?
NCAA Basketball Tournament. Each year, 64 college basketball teams compete in the NCAA tournament. Sandbox.com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games.
Mean income of $30,000and a standard deviation of $3,000. What is the income that separates the top 25% from the lower 75% of the incomes?
Formulate the null and alternative hypotheses for a hypothesis test. Identify the population and describe how to select a random sample for a hypothesis test. State in clear terms the conclusion that should be given if the null hypothesis is rejec..
Formulate a linear programming model for this problem.
After performing a two sample t-test, you see a p-value of 0.0355. Of the following, which is the appropriate conclusion?
The annual income among male and female nurses differs significantly. There is a significant difference in the length of hospitalization among patients admitted from nursing homes, rehabilitation facilities and home
The following set of data represents the number of hospitals for selected states. Find the mean, median, mode, midrange, range, variance, and standard deviation for the data?
A box contains 5 red marbles and 10 blue marbles. You can take 3 marbles at random, without replacement. What is the probability of winning this game?
If H0 is in reality false and it is legitimate to use a directional H1, which of the following will yield a more powerful test? one-tailed alternative hypothesis
Do these data provide sufficient evidence to reject the claim made by Creative Good? Two sample F-test for the ratio of population variances
75% of students live in dormitories. A random sample of 5 students is selected. Using the binomial probability tables, find the probability that none of the students lives in the dormitories?
A recent study claimed that 15% of all eighth- grade students are overweight. In a sample of 80 students, 9 were found to be overweight. At a= 0.01, is there enough evidence to reject the claim using critical values?
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