Correlation Coefficient
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Anthony Clark
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11 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
r=-0.89
Strong positive
Weak positive
Strong negative
Weak negative
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Estimate the correlation coefficient
r = 1
r = -1
r ≈ -0.8
r ≈ 0.8
r ≈ -0.5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Describe a correlation with a coefficient of r=-0.89
Strong positive
Weak positive
Strong negative
Weak negative
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Describe a correlation with a coefficient of r=0.3
Strong positive
Weak positive
Strong negative
Weak negative
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A perfect negative correlation has a correlation coefficient of ____.
1
-1
0
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which graph represents data that has a correlation coefficient close to -1?
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