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Question 19

19.THE COVARIANCEIS

Group of answer choices

ALL OF THE ABOVE

AN UNSTANDARDIZED VERSION OF THE CORRELATION COEFFICIENT

A MEASURE OF THE STRENGTH OF RELATIONSHIP BETWEEN TWO VARIABLES

DEPENDENT ON THE UNITS OF MEASUREMENT OF THE VARIABLES

Question 20

20.HOW MUCH VARIANCE HAS BEEN EXPLAINED BY A CORRELATION OF 0.9 ?

Group of answer choices

100%

9%

18%

81%

Question 21

21.A CORRELATION OF 0.7 WAS FOUND BETWEEN TIME SPENT STUDYING AND PERCENTAGE ON AN EXAM . WHAT IS THE PROPORTION OF VARIANCE IN EXAM SCORES THAT

CAN BE EXPLAINED BY TIME SPENT STUDYING ?

Group of answer choices

0.49

0.70

0.80

0.30

Question 22

22..IF PEARSON'S CORRELATION COEFFICIENT BETWEENSTRESS LEVEL AND WORKLOAD IS 0.8, HOW MUCH VARIANCE IN STRESS LEVEL IS NOT ACCOUNTED FOR BY WORKLOAD ?

Group of answer choices

8%

36%

20%

2%