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Mr.Smith works on a temporary basis. The mean length of each job he gets is three months. If the amount of time he spends between jobs is exponentially distributed with distributed with mean 2, then at what rate does Mr. Smith get new job?
Would it be sensible to conclude that more than 10% of applicants are now failing the test?
Using smoothing constant of w = .80, compute the value of exponentially smoothed series in 1983.
Why is population shape of concern when estimating a mean? What does sample size have to do with it?
In a recent study of incomes in Allegheny county in Pennsylvania it was found that distribution of family incomes is skew to the right. what can we say about the relationship between mean and median?
Use the population standard deviation along with the sample mean, S, and find a 92% confidence interval for the population mean. Is the true population mean contained in this interval?
Discuss the role of sensitivity analysis in LP. Under what circumstances is it needed, and under what conditions do you think it is necessary?
In a surgey of 280 adults over 50.80%; said they were taking vitamin supplements. Find the margin of error for this survey if we want a 99% confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
Todd is less interested in testing a hypothesis than he is in developing an estimate for what people would be willing to pay. He would like 95% confidence intervals for the average price people would be willing to pay
Determine the probability that particular call lasted between 110 and 180 seconds?
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
The buyer-believes that the differences are normally distributed and will use this sample to perform an appropriate test at a level of significance of 0.01.
Find out the probability that temperature of oven will range from 460 to 470 F?
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