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- 1. Multiple Choice
A study compared the number of years of education and a person's annual salary. The correlation coefficient of the data was r = 0.913. What is the coefficient of determination?
0.834
0.887
0.457
0.913
- 2. Multiple Choice
The relationship ship between a woman's show size and length of her foot, in inches, is given in the table.
Calculate the coefficient of determination
1.5
0.75
1
0.5
- 3. Multiple Choice
As shown in the table, a person's target heart rate during exercise changes as the person gets older. Use the graphing calculator to find the coefficient of determination.
-0.999
-0.664
0.998
1.503
- 4. Multiple Choice
What is the coefficient of determination for the data characteristics shown?
-.928
.928
.861
-.861
- 5. Multiple Choice
What COULD be the approximate value of the correlation coefficient for the scatter plot?
-.851
-.162
0.211
0.905
- 6. Multiple Choice
If the coefficient of determination is 0.876, what percent of the variation is explained?
56%
88%
-67%
92%
- 7. Multiple Choice
When if ever, would the correlation coefficient (r) be equal to the coefficient of determination (r squared)?
when the correlation is perfect (r=1)
they never will
when the correlation is somewhat strong
when there exists no correlation
- 8. Multiple Choice
Which calculator output shows the strongest relationship between x and y?
- 9. Multiple Choice
Which graph represents data that has a correlation coefficient close to -1?
- 10. Multiple Choice
Which scatter plot diagram shows the strongest positive correlation?
- 11. Multiple Choice
In a science lab, Thelma determined the kinetic energy of an object at various velocities, V, and found the correlation coefficient between kinetic energy and velocity to be 0.872. Which graph shows this relationship?
- 12. Multiple Choice
Using your graphing calculator determine coefficient of determination for the data in the table.
.942
0.888
0.765
0.222
- 13. Multiple Choice
If the coefficient of determination is 0.876, what percent of the variation is unexplained?
56%
88%
12%
92%
- 14. Multiple ChoiceShown is a residual plot. Would a linear regression model of the data be most appropriate?YESNO
- 15. Multiple ChoiceThis residual graph represents a linear fit.This graph represents a nonlinear fit.This residual graph represents no fit.
- 16. Multiple ChoiceThis residual plot represents a linear fit.This residual plot represents a nonlinear fit.This residual plot represents no fit.
- 17. Multiple Choice
10
8
4
5
- 18. Multiple ChoiceA scatter plot and residual plot are the same thing.TrueFalse
- 19. Multiple Choice
Shown is a residual plot. How many negative residuals are there?
5
1
3
9
- 20. Multiple Choice
Shown is a residual plot. How many positive residuals are there?
5
1
3
9
- 21. Multiple Choice
I predicted someone would score a 78% on their test, but they actually scored an 81%. What's the residual?
81 - 78 = 3
78 - 81 = -3
What's residual?
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