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Use MegaStat's output for multiple regression to determine the multiple regression equation, to explain the meanings of the coefficients, find meaning with coefficient of determination (r2), make conclusions using the F-test (and its p-value), decide which variables significantly affect independent variable and make predictions of dependent variable for given values of independent variables.
If statistically significant, do you think the difference is large enough to be important?
Concept of statistical signi cance
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Consider the following estimated regression equation, based on 10 observations.
A Correlation matrix (correlation, coefficients and probability level under the hypothesis rho= 0) for a company's sales force (age, years of service, and current sales) is given below. Comment.
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
Determine the values of mean M and standard deviation s for original sample?
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was
Set up dummy coded dummy variables to contrast each of the other groups to Group 2, medium Anxiety; run a regression to predict exam performance (Y) from these dummy coded dummy variables.
Determine the average score for ERAU graduates? Determine the value of test statistic? Significance level?
Recent actual and forecasted data for product XYZ is given in the following table.
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