<Correlation> Q. A researcher measures the relationship between sleep medication
ID: 130050 • Letter: #
Question
<Correlation>
Q. A researcher measures the relationship between sleep medication use (times used per week) and time spent working (in hours per week). Answer the following questions based on the results provided.
1.
Compute the Pearson correlation coefficient. (Round your answer to three decimal places.)
2.
Multiply each measurement of drug use times 3 and recalculate the correlation coefficient. (Round your answer to three decimal places.)
3.
Divide each measurement in half for time spent working and recalculate the correlation coefficient. (Round your answer to three decimal places.)
4.
True or false: Multiplying or dividing a positive constant to one set of scores (X or Y) does not change the correlation coefficient. Note: Use your answers in (1) to (3) to answer true or false.
Sleep Medication Use Time Spent Working 11 16 6 39 8 20 5 31Explanation / Answer
(Answers)
(1) -0.842
(2)-0.842
(3) -0.842
(4) Multiplying or dividing a positive constant to one set of scores (X or Y) does not change the correlation coefficient. Note: Use your answers in (1) to (3) to answer true or false. - TRUE It does not make any difference.
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