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Consulting income at Kate Walsh Associates for the period of Feburary-July has been as follows:
(income in 1000's)
Feb. 70.0Mar. 68.5Apr. 64.8May 71.7Jun. 71.3Jul. 72.8
Use exponential smoothing to forcast Aug. income. Assume that the initial forecast for Feb. is $65,000. The smoothing constant selected is x=0.1
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a 1 or 2 tail test?
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
Test the hypothesis that no difference exists between the groups at α = .05 and perform and report all related tests and statistics.
Table shows the smoking habits of group college students. If student is selected at random, determine the probability of getting someone who is man or a woman.
Plot the data on the same line and give your impression regarding any apparent differences between the two companies.
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
Robinson & Associates performs employment screening for large companies in southern California. It usually follows two-step process. First potential applicants are given a test that covers basic knowledge and intelligence. If applicants score b..
Calculate the paired sample t statistic for these mood scores and How has the relation between the mean and the median changed? What does this suggest about the distribution of the transformed data?
Suppose that you're the Quality Manager for the Emerson D. Meritz Machine Tool Company. Your model IE566 grinding machine is afflicted by three types of defects classified as major (type A), serious (type B) and minor (type C).
Find out the probability that a student from the whole school system, chosen at random, has passed?
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