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The human resources (HR) manager for Gargantua, Incorporated wants to give a short survey to a sample of recent hires (defined as people who have been with the company for less than one year). This sample will include several thousand individuals. The HR manager wants to be able to develop a confidence interval for the proportion of new hires that are happy with the company.
To get the sample, he plans to stand at the door as people are entering and leaving a quarterly employee communications meeting. Whenever he sees someone with a red badge, which indicates less than one year with the company, he will stop that person and give him or her a packet with the survey and instructions.
Critique the HR manager's planned approach and give him advice on how to proceed. You can assume that a reasonable estimate for the proportion of new hires that are happy with the company is .8.
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
h-p is said to be the leading seller of pc's in the U.S WITH 27% share of the pc market. if a researcher selects 130 recent pc purchases
Regression equation Credits=15.4-.07. Select the correct statement. Increase in number of hours worked per week increases the expected number of credits.
Do you think this statement has any merit? Why or why not? Explain why the manager may have said it and then further substantiate his argument or compose a rebuttal.
What is the margin of error for a 95% confidence interval for the difference of the two means (low capacity - high capacity)? (Answer to the nearest hundredth.)
Calculate correlation coefficient for these sample data.
Determine the probability of a positive economic trend given an increasing employment. Are employment and economic trend independent?
IS there any evidence that a freshman's chances to graduate may depend upon what kind of high school the student attended? Describe.
Jack is doing a project in educational psychology. Before the experiment, he rank-orderes all his participants according to achievement test scores.
Test whether there is difference in the two population mean. Use p-value approach
illustrate briefly how an experimental study is conducted. What is the difference between the two types of variables used.
A sample of approx 25 students enrolled in the university points out that X (bar) = $315.4 and s = $43.20.
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