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Mathematics
11th -
Professional Development
Pearson's Correlation Coefficient Review
15 questions
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- 1. Multiple Choice
Correlation coefficient is represented by "R".
True
False
- 2. Multiple Choice
The correlation coefficient is a number "r" such that:
-1 < r < 1
-1 > r > 1
-1 ≤ r ≤ 1
-1 ≥ r ≤ 1
- 3. Multiple Choice
If every brother is exactly two inches taller than his sister, what would the correlation between the heights of brothers and sisters be?
Nearly 1
0
Somewhat positive
1
- 4. Multiple Choice
Correlation applies to both quantitative and categorical data.
True
False
- 5. Multiple Choice
Which of the following is true for correlation coefficients?
x is the explanatory variable and y is the response variable.
x is the response variable and y is the explanatory variable.
The choice of x and y as the explanatory and response variables does not matter.
- 6. Multiple Choice
Estimate the correlation coefficient
r = 1
r = -1
r ≈ -0.8
r ≈ 0.8
r ≈ -0.5
- 7. Multiple Choice
Estimate the correlation coefficient for this scatterplot.
A) r = 1.2
B) r = 0.89
C)r = 0
D) r = -0.89
- 8. Multiple Choice
Which graph represents data that has a correlation coefficient close to -1?
- 9. Multiple Choice
What type of association does this scatter plot represent?
Positive linear association
Negative linear association
No association
Nonlinear association
- 10. Multiple Choice
Which value is the closest to the correlation coefficient for the data?
-0.07
-0.73
0.07
.73
- 11. Multiple Choice
Which scatter plot diagram shows the strongest positive correlation?
- 12. Multiple Choice
The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?
A) As the number of coffee shops increase, violent crimes appears to increase.
B) The line of best fit (regression line) shows a positive correlation
C) The data has a positive correlation coefficient
D) An increase in coffee shops causes an increase in violent crimes
- 13. Multiple Choice
Which best represents no correlation?
the amount of tea that is drank and level of intelligence.
the temperature and what people wear outside.
how much you study and your grades.
where you signed up for a cell phone plan and your area code.
- 14. Multiple ChoiceRank these scatter plots according to the intensity of the correlation represented, from weakest to strongest.1, 2, 3, 42, 4, 3, 14, 3, 2, 11, 3, 4, 2
- 15. Multiple ChoiceThe following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?A. 50 minB. 80 minC. 45 minD. 60 min
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