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Find out the critical value for the one-tailed hypothesis test in which a null hypothesis is tested at 5% level of significance based upon a sample size of 25?
A statistics department is holding alumni by telephone asking for donation to aid fund new computer laboratory. Past history describes that 40% of the alumni contacted in this manner will make the
A fraction nonconforming control chart with the centerline 0.10, UCL=0.19, and LCL=0.01 is employed to control the process.
A researcher, under the guise of participant, joined two "singles dating sites" to test advertised superiority of one over the other.
Describe the difference between sample and sampling distribution. Your response must be in complete sentences and you might use sketches to aid you.
You're interested in average number of months MSU graduates spend looking for jobs regarding graduation as compared to RU students.
As an MSU student, you would like to know average grade point average (GPA) for all students enrolled in the MSU in spring semester of 2007.
Compute the appropriate Test Statistic to test the hypothesis that the proportion of condominiums that sold in 30 days reduced from 2006 to 2007.
Is your sample of MSU students significantly different from population of MSU students in terms of number of classes they take per semester (employ alpha level .05)? To answer this question, f
An engineering firm bids on contracts for the short-term jobs where each job can generate the profit of $100,000 for the firm. Assume the probabilities of getting zero to five such jobs in the certa
Find out the probability that at least 10 households own DVD players. Do not use any Normal approximations.
Find out the following areas under standard Normal distribution curve:
Assume the commuting time for people who work in the New York City is normally distributed with average of 42.3 minutes and standard deviation of 8.5 minutes.
He desires to set the prices of the condominiums he wants to sell so that he would cover the middle 75% of market in terms of price range. What must he set the minimum and maximum prices of hi
Nothing is known regarding the distribution of distribution except that the standard deviation is 100. If a sample of 50 students is randomly chosen, find out the probability that their average SAT
Assume a fair die is rolled 120 times. Find out the probability that the number of rolls that the score is six is between 15 and 25 (comprising both 15 and 25)?
Let X and Y have joint pdf f (x, y) = ke-2xe-y for x, y ³ 0. Find out the marginal pdf's for X and Y and using them obtain E(X) and E(Y).
A die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal the maximum of two observations and let Y equal the minimum. Find out the joint pmf of X and Y, and correlation coefficient. Are X and
The owner of Britten's Egg Farm desires to estimate mean number of eggs laid per chicken. A sample of 20 chickens shows they laid the average of 20 eggs per month with standard deviation of two eggs
What are the values for a and b? What is the mean of this uniform distribution? What is the standard deviation? Show that the total area is 1.00.
According to insurance institute of America, family of 4 spends between $ 400 and $3,800 for each year on all kinds of insurance. Assume then money spent is uniformly distributed between these
A biopsychologist studies role of brain chemical serotonin in aggression. One sample of rats serves as the control group and receives a placebo.
A normal distribution has mean of 80 and standard deviation of 14. Determine the value above which 80 percent of the values will occur.
A population is estimated to have the standard deviation of 10. We want to estimate population mean in 2, with 95 percent level of confidence. How large a sample is needed?
A researcher would like to find out if relaxation training will affect number of headaches for chronic headache sufferers. For the week prior to training, each participant records number of headache