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Corporation owns several companies. Strategic planner for corporation believes dollars spent on advertising can to some extent be the predictor of total sales dollars. As the aid in long-term planning, she collects the following sales and advertising information from twelve of companies for 2011 (in $ millions). Solve by excel and by mega stat
ADVERTISING SALES12.5 1483.7 5521.6 33860.0 99437.6 5416.1 8916.8 12641.2 37918.4 23226.3 31248.7 44258.4 513
1) Is regression statistically significant? Let α = .05. What do you conclude?2) Point to the regression equation. If x = 40 what is an estimate for y.3) Determine the Standard Error of the Estimate, Se.4) Compute the 95% confidence and prediction intervals for values of y for X = 40.5) Determine correlation coefficient, Interpret.6) Compute coefficient of determination, Interpret.7) Verify the coefficient of determination from the ANOVA table values. 8) Verify the standard error of the estimate from the ANOVA table values.
Calculate the population mean and compare it to the mean of the sampling distribution.
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A random sample of 15 college graduates revealed that they worked an average of 5.3 years on the job before being promoted. The sample standard deviation was 1.2 years. Using the 0.95 degree of confidence, what is the confidence interval for the p..
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Suppose a random sample of 25 swatches are selected. What is the probability that the mean of the sample is less than 235 pounds per square inch.
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