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The following information was obtained from matched samples. The daily production rates for a sample of workers before and after a training program are shown below. Worker Before After 1 20 22 2 25 23 3 27 27 4 23 20 5 22 25 6 20 19 7 17 18 What is the point estimate for the difference between the means of the two populations? What is the null hypothesis to be tested? What is the test statistic? Develop a hypothesis test and illustrate your analysis to support your conclusion.
Describe the Linear programming problem with constraints. Which among the following is not acceptable as a constraint in a linear programming problem?
Choose a number at random from the set of numbers from the set of numbers {1,2,3,4,5}. Now choose a number from the subset {1,...,X). Call this second number Y.
Find the mean lifetime of this device? A electrical device consists of 4 identical components arranged so that the device functions if and only if all four components are working.
State the null and alternate hypotheses, the decision rule, find the test statistic, state your decision, and estimate the P value for the following:
Investment A has an expected return of $25 million and Investment B has an expected return of $5 million. Market risk analysts believe the standard deviation of the return from A is $10 million
A thorough examination reveals that there is nothing wrong with the filling machine. From a statistical standpoint, was there a type error made? If yes, which type? Explain.
What then is the probability that a shaft will be acceptable? Suppose that the diameter of the shaft is a random variable that is Normally distributed.
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?
Find the mean/standard error of the sampling distribution of the proportion. Assume that 26% of students at a university wear contact lenses. We randomly pick 300 students.
In1990, 5.8% ofjob applicants whowere testedfor drugsfailed thetest.
question if the iq scores are normally distributed with a mean of 100 and a standard deviation of 15.a find the
Finds that 3 contain errors. If the accountant's theory is correct, what is the probability that at least 3 invoices contain errors in a random sample of 10?
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