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A processing plan wants to find out if there is the difference in the mean time of processing for three different plans. Complete a full ANOVA test to find out if there is a difference. Employ alpha
A local school district wanted to know whether mean weekly salary of administrators was larger than that of teachers. They took samples, and results were as follows.
Leeds is looking at a new stamping process. Stamping now takes 42.3 seconds per bag. Under a new process, they were able to stamp 24 bags with a mean time of 40.6 seconds, and a sample std dev of 2
A bank claims that customers wait for service a mean of 3 minutes with a population std deviation of 1 minute. At one office, a sample of 50 customers was taken, and they found that the mean wait ti
In the past, of all the students enrolled in "Basic Business Statistics" 10% earned A's 20% earned B's, 30% earned C's, 20% earned D's and the rest either failed or withdrew from the course.
Suppose that X has a lognormal distribution with parameters and . Determine the following:
Connecticut Board of Education is concerned that first year female high school teachers are receiving lower salaries than their male counterparts.
Consider a system of two electronic component connected in a series. Each component functions with probability p and the components functions independently of each other. What is the probability tha
From a deck of cards, draw four cards at random, without replacement. if you get #n aces, draw n cards from another deck. What's the probability of getting exactly two aces from each deck?
Suppose you possess some of a radioactive substance that has a half-life of 31 days. What fraction of the substance will remain after 217 days?
Determine the probability function of x? Determine the cumulative distribution function of x? Redo a-e where the experiment consists of repeatedly tossing the object until a D appears.
The weight of a sophisticated shoe is normally distributed with a mean of 12 ounces and a standard deviation of .5 oz. What must the standard deviation be in order for the company to state that 99.9
Five mid-distance runners were randomly chosen before they were trained with coach Popovich's six-month training program as well as their completion time of 1500-meter run was recorded (in minutes).
What is the probability that the representative (in problem above) will find 2 persons who prefer their principle product out of the first 5 approached?
What is your 95% worst case cost, labor and parts, for warranty repair? Determine the probability of your total warranty repair cost exceeding $600?
Suppose X1,X2....Xn are independent random variables with uniform distribution on (0,1). Define X=max(X1,X2...Xn)
The engineer obtained a random sample of 66 measurements and computed the SSE for both the complete model and the reduced model. The values were 1477.8 and 1678.8, respectively. Perform the appropri
Given the following estimates of various components of genetic variation:
Assume that a sample is employed to estimate a population mean, µ. Use the given confidence level and sample data to find the margin of error.
Employ the given information to find out the minimum sample size needed to determine an unknown population mean, µ.
Suppose that the population of heights of female college students is approximately normally distributed with the mean m of 67.16 inches and standard deviation s of 4.82 inches.
Write down a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 115 hour
A researcher claims that average age of people who purchase theatre tickets is 50. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 8. At a = 0.01 is
Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decima
Suppose X1,X2,....,Xn are independent random variables with uniform distribution on (0,1). Define X=max(X1,X2,...,Xn)