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This activity contains 15 questions.

Question 1.
The equation for the multiple regression model with one independent variable is shown below.


In this equation, the net regression coefficient is:

End of Question 1

Question 2.
The prediction interval estimate is __________ the 95% confidence interval estimate.

End of Question 2

Question 3.
The formula for the coefficient of multiple determination is:

End of Question 3

Question 4.
The coefficient of multiple determination should be adjusted when dealing with multiple regression models. The adjusted ch13-04a.gif reflects the:

End of Question 4

Question 5.

Dwayne is curious about why bees pollinate certain flowers over others. Let ch13-05a.gif represent the size of the flower, let ch13-05b.gif represent the color intensity, and let Y be the frequency of pollination. The slope of ch13-05c.gif with Y is 0.4213 when ch13-05b.gif is held constant, and the standard error in the regression coefficient is 0.0895. Find the value of t in the test for the slope in multiple regression.
End of Question 5

Question 6.
A researcher wants to estimate the population value of a regression coefficient including a confidence interval. The formula for the confidence interval estimate for the slope is:

End of Question 6

Question 7.

Given two independent variables ch13-07a.gif and ch13-07b.gif, if the sum of squares due to regression of both ch13-07a.gif and ch13-07b.gif is equal to 15, and the error mean square is equal to 1.5, what is the value of F in the partial F-test for determining the contribution of an independent variable?
End of Question 7

Question 8.
The t statistic is equal to the __________ of the F statistic.

End of Question 8

Question 9.
The proportion of the variation in the dependent variable attributed to each explanatory variable while all other explanatory variables are held constant is measured by:

End of Question 9

Question 10.
The quadratic curvilinear regression model is similar to the multiple regression model except that the second explanatory variable is the __________ of the first explanatory variable.

End of Question 10

Question 11.
The formula for the transformed exponential model is:

End of Question 11

Question 12.

If the coefficient of multiple determination of explanatory variable ch13-12a.gif is equal to 0.546 with all other B variables, what is the value of the variance inflationary factor for ch13-12b.gif?
End of Question 12

Question 13.
__________ regression is the search procedure which attempts to find the best regression model without examining all possible regressions.

End of Question 13

Question 14.

In addition to the adjusted ch13-14a.gif value, the statistic most often used to evaluate competing regression models and measure the differences between a fitted regression model and a true model, along with the random error is the:
End of Question 14

Question 15.
One method of measuring collinearity uses the:

End of Question 15

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