Complete the following questions to practice the skills you have learned in this lesson.
- Select three values for that indicate a positive slope for the line of best fit.
- 1
- -1
- 0.5
- -0.5
- 0
- 0.8
- -0.8
- Select three values for that indicate a negative slope for the line of best fit.
- 0
- 1
- -1
- -0.87
- 0.32
- -0.24
- 0.24
- The correlation coefficient, , is given for several different linear models. Order the correlation coefficients as follows: start with the -value indicating the strongest linear relationship and end with the -value indicating the weakest linear relationship.
0.4, –0.85, 0.72, –0.31
- The correlation coefficient, , is given for several different linear models. Order the correlation coefficients as follows: start with the -value indicating the strongest linear relationship and end with the -value indicating the weakest linear relationship
–0.65, 0.47, –1, 0.89
5. Match the following scatter plots to the correct correlation coefficient from the following:
Scatter Plot A
-
r=-0.79
-
r=0.88
-
r=-0.33
-
r=0.67
Scatter Plot B
-
r=-0.79
-
r=0.88
-
r=-0.33
-
r=0.67
Scatter Plot C
-
r= -0.79
-
r=0.88
-
r=-0.33
-
r=0.67
Scatter Plot D
-
r= -0.79
-
r=0.88
-
r=-0.33
-
r=0.67
6. Match the following scatter plots to the correct correlation coefficient from the following:
Scatter Plot A
-
r=-0.85
-
r=-0.67
-
r=0.83
-
r=0.37
Scatter Plot B
-
r=-0.85
-
r=-0.67
-
r=0.83
-
r=0.37
Scatter Plot C
-
r=-0.85
-
r=-0.67
-
r=0.83
-
r=0.37
Scatter Plot D
-
r=-0.85
-
r=-0.67
-
r=0.83
-
r=0.37
7. Which of the following correlation coefficients would best describe this scatter plot?
-
0.32
-
-0.87
-
0.87
-
-0.32
8. Which of the following correlation coefficients would best describe this scatter plot?
-
0.62
-
-0.94
-
0.94
-
-0.62
9. Which of the following has the stronger linear relationship? Explain.
Scatter Plot A:
Scatter Plot B:
-
Scatter plot B
-
Scatter plot A
10. Which of the following correlation coefficients would best describe the scatter plot?
-
-0.43
-
0.43
-
0.89
-
-0.89