In: Statistics and Probability
In a large statistics class, students have taken two tests. For
the following situations, report what...
- In a large statistics class, students have taken two tests. For
the following situations, report what you would expect for the
value of the correlation coefficient between test 1 score and test
2 score.
Every student scores ten points lower on test 2 than on test
1.
Hint: Draw a graph with test 1 score on the horizontal axis and
test 2 score on the vertical axis. Place the dots for each student
appropriately in the field based on how test 1 score compares to
test 2 score.
- The correlation coefficient would be 0.
- The correlation coefficient would be –1
- The correlation coefficient would be +1
- The correlation coefficient would be a value not listed
here.
- In a large statistics class, students have taken two tests. For
the following situations, report what you would expect for the
value of the correlation coefficient between test 1 score and test
2 score.
Every student scores twice as many points on test 2 than on test
1.
Hint: Draw a graph with test 1 score on the horizontal axis and
test 2 score on the vertical axis. Place the dots for each student
appropriately in the field based on how test 1 score compares to
test 2 score.
- The correlation coefficient would be 0.
- The correlation coefficient would be –1.
- The correlation coefficient would be +1.
- The correlation coefficient would be a value not listed
here.
- In a large statistics class, students have taken two tests. For
the following situations, report what you would expect for the
value of the correlation coefficient between test 1 score and test
2 score.
Every student scores half as many points on test 2 than on test
1.
Hint: Draw a graph with test 1 score on the horizontal axis and
test 2 score on the vertical axis. Place the dots for each student
appropriately in the field based on how test 1 score compares to
test 2 score.
- The correlation coefficient would be 0.
- The correlation coefficient would be –1.
- The correlation coefficient would be +1.
- In a large statistics class, students have taken two tests. For
the following situations, report what you would expect for the
value of the correlation coefficient between test 1 score and test
2 score.
Every student guesses randomly on every question on both
tests.
Hint: Draw a graph with test 1 score on the horizontal axis and
test 2 score on the vertical axis. Place the dots for each student
appropriately in the field based on how test 1 score compares to
test 2 score.
- The correlation coefficient would be 0.
- The correlation coefficient would be –1.
- The correlation coefficient would be +1.
- The correlation coefficient would be a value not listed
here.
- In a large statistics class, students have taken two tests. For
the following situations, report what you would expect for the
value of the correlation coefficient between test 1 score and test
2 score.
Every student scores 100 points for his/her combined score for
the two tests.
Hint: Draw a graph with test 1 score on the horizontal axis and
test 2 score on the vertical axis. Place the dots for each student
appropriately in the field based on how test 1 score compares to
test 2 score.
- The correlation coefficient would be 0.
- The correlation coefficient would be –1.
- The correlation coefficient would be +1.
- The correlation coefficient would be a value not listed
here.