Curriculum
Course: Statistics — Third Secondary
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Curriculum

Statistics — Third Secondary

Unit 1: Correlation and Regression

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Unit 2: Advanced Statistical Measures

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Unit 3: Probability

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Unit 4: Random Variables

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Unit 5: The Normal Distribution

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Quiz

Correlation — Lesson quiz

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  • Questions count: 6
  • Passing grade: 60%
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1.
What is the value of r if all points lie on a straight line falling to the right?
r = 1
r = 0
r = −1
r = 2
2.
What type of correlation is shown when the points rise from the lower left to the upper right?
Positive correlation
Negative correlation
No correlation
Perfect negative correlation
3.
If r = −0.2, what is the strength and direction of the correlation?
Strong positive correlation
Weak negative correlation
Strong negative correlation
No correlation
4.
Find r for x: 2, 4, 6 and y: 1, 2, 3.
0
−1
0.5
1
5.
Does a strong correlation between two variables mean that one of them causes the other?
Yes, a strong correlation proves that one causes the other
No, both variables may be affected by a common third factor
Yes, because r is greater than zero
No, because correlation never measures strength
6.
If r = 0, can a relationship still exist between the two variables?
No, there is no relationship at all
No, because r = 0 means perfect negative correlation
Yes, a non-linear relationship may exist, because r = 0 only means there is no linear correlation
Yes, because r = 0 means perfect positive correlation
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