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copy machine repair company claims that its average repair cost is less than $100. To check this claim, a simple random sample of 30 repairs made by this company is taken. The sample average is $97, and the SD is $17. Assume that the repair cost has a normal curve.
If not what would be a better testing strategy? Could you form a Null Hypothesis or an Alternative Hypothesis? If yes, what would they be.
Perform all pairwise comparisons among the three programs, using a Tukey adjustment and an overall significance level of 0.05, then interpret all your results.
Formulate this statement as a multiple regression model (form only, without parameter estimation).
Forecast quarterly demand where x = 0 in second quarter of last year. Quarterly seasonal factors are Q1=1.5, Q2=0.8, Q3=1.1, Q4=0.6. Determine the forecast for last quarter?
Type the above data into the SPSS Data Editor window, or save this file as an unformatted text file and write SPSS syntax to read it in.
To test the hypothesis that students who finish an exam first get better grades, Professor Barker kept track of the order in which papers were handed in.
Summarize the relationship between sample size and confidence level.
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
A shipment of 10 items has two defective and eight nondefective items. In the inspection of the shipment, a sample of items will be selected and tested. if a defective item is found the shipment of 10 will be rejected.
Develop a linear regression equation for these data and forecast how much money Robert will win if he spends $30.
In optimal solution, determine minimum time needed to complete project?
Which of the following methods could lead to stronger evidence for the outcome of a nonparametric test?
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