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Twenty-five samples of size 4 resulted in statistics of x=30.0 minutes and R = 2.5 minutes for the company to completely clean a rug. Compute control limits for x- and R-charts and estimate the standard deviation of the process.
Solve manually and then by mega stat. Indicate your decision rule, your hypotheses and your statistical and management conclusions."
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
Research question : At α = . 05, is cockpit noise level independent of flight phase?
a. How many of the individuals selected in your sample are female? b. How is the stratified sample different from the SRS?
How do question content and wording, response strategy, and preliminary analysis planning affect question construction?
Test the hypothesis that the annual incomes of Teachers in areas of more than 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
To find out whether two categorical variables are independent, one should use the.
Find out point estimate and 95% confidence interval for mean family dental expenses of all employees of company.
For following two regressions describe and interpret major parts from regression output. write down the difference between two regressions?
Which of the following does not explain a possible relationship between variables when the null hypothesis is rejected
Choose a product you are familiar with as a consumer. Answer the following. What type of demand patterns would that product have - cyclical, secular, seasonal, etc. or a combination of several types? Explain.
At 95% confidence using the p- value approach, test the hypotheses. Let α = 0.1.
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