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Use Excel to make a scatter plot of these vehicle data, placing Weight on the X-axis and City MPG on the Y-axis. Add titles and modify the default colors, fonts, etc., as you judge appropriate to make the scatter plot effective. (b) Describe the relationship (if any) between X and Y. Weak? Strong? Negative? Positive? Linear? Nonlinear?
Determine the point estimate and 95% confidence interval for the mean family dental expenses of all employees of the company.
Describe the mean difference that is the main effect for the treatment. Describe the mean difference that is the main effect for gender. Is there an interaction between gender and treatment? Explain the answer
Failure times for a randomly failing component are 3.3, 14.3, 27.1, 41.3, and 92.2 hours. Find the MTTF and standard deviation using: a) moment estimation. b) maximum likelihood estimation.
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make? Please provide step by step solution.
The superintendent of a printing plant has selected a random sample of 100 rolls of paper from a large shipment. The average length of the sample rolls is 416 feet, with a variance of 2704 feet.
The mean is 75 and the standard deviation is 6. If 1200 students took the test, approx how many students would be expected to score between 69 and 81?
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
Suppose these data represent whole population. Determine the population mean and population standard deviation.
Develop a 90 percent confidence interval for the proportion of applicants that fail the test. (Round your answers to 2 decimal places.)
Complete hypothesis test using a 5% level for risk with directional research hypothesis.
Categorize the following as the example of nominal, ordinal, interval, or ratio level of measurement, and define why it represents this level: marital status of company's employees.
A recent report from the American Medical Association claims that for the first time in ten years, the average salary of psychiatrists was greater than $190,000 with a standard deviation of $27,000. What is the null hypothesis for his claim?
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