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The expected life of refrigerators produced by the KeepItCool Company are normally distributed with a mean of 240 months and a standard deviation of 15 months. If the manufacturer wants to have to replace only 2% of its refrigerators, what should its warranty be?
If a gambler rolls two dice and gets a sum of four, he wins $10; and if he gets a sum of three, he wins $25. The cost to play the game is $5. What is the expectation of this game?
Assuming that this procedure yields a binomial distribution, find the mean and the standard deviation for the number of households in this sample who have cable TV.
In StaTScan what is the difference between a spatial cluster size to 25% of the population risk and one with 50% window ? In StaTScan what is the difference between space-time permutation and space-time?
a manufacturing engineer is studying the dimensional variability of a particular component that is produced on three
The chi-square goodness of fit is______________a one-tailed test with the rejection region in the right tail.
For a particular population, a sample of n = 9 scores has a standard error of 4. For the same population, a sample of n = 16 scores would have a standard error of ??
At least 150 individuals will cooperate and respond to the questions? In other words, what is the probability that the sample proportion will be at least 150/400 = .375?
past experience has shown that on the average only 1 in 10 wells drilled hits oil. let x be the number of drillings
What is the conditional probability of a manager in the Division of Community Services reporting workplace sexual harassment?
lake wobegon junior college admits students only if they score above 400 on a standardize achievement test. applicants
One suggested environmental determinant of pediatric lung function is the level of cigarette smoking in the home. A researcher wants to do a pilot study with two groups:
The company can alter the standard deviation. Use a sketch to decide how the company can proceed if they want to reduce this proportion by changing the standard deviation.
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