QUESTION 1 “The more students study, the higher their final grades.” In the abov

Question

QUESTION 1

“The more students study, the higher their final grades.” In the above statement, which variable is the criterion?

the students

the amount of time spent studying

the act of studying

the final grades

4 points   

QUESTION 2

“Middle-aged women lose weight in direct proportion to the amount they exercise.” In the above statement, which variable is the criterion?

the middle-aged women

the amount of weight lost

the act of exercising

the amount of exercise

4 points   

QUESTION 3

The utility of IQ scores for selecting Honors Program assignment implies what kind of prediction relationship between IQ and academic performance?

positive

causal

negative

perfect

4 points   

QUESTION 4

Which of the following coefficients of correlation would be of greatest use in helping make a prediction?

-.80

.00

+.15

+.60

4 points   

QUESTION 5

If r = 1.00, which one of the following will be true?

Scores on X will be of no use in predicting scores on Y.

Scores on Ycan be perfectly predicted from scores on X.

The scores on X and Y are both negative.

The relationship becomes difficult to interpret.

4 points   

QUESTION 6

In concept, a regression line is most closely related to which descriptive statistic?

mean

median

standard variation

range

the students

the amount of time spent studying

the act of studying

the final grades

Explanation / Answer

QUESTION 1

“The more students study, the higher their final grades.” In the above statement, which variable is the criterion?

Answer:

The amount of time spent studying

(Criterion for higher grades is more time spent for study.)

QUESTION 2

“Middle-aged women lose weight in direct proportion to the amount they exercise.” In the above statement, which variable is the criterion?

Answer:

The amount of exercise

(Criterion for losing weight is the amount of exercise.)

QUESTION 3

The utility of IQ scores for selecting Honors Program assignment implies what kind of prediction relationship between IQ and academic performance?

Answer:

Causal

(IQ scores and academic performance are positively correlated. Academic performance is related with selecting Honors Program assignment. Change in one variable is the cause of change in other variable. So, relationship is causal relationship.)

QUESTION 4

Which of the following coefficients of correlation would be of greatest use in helping make a prediction?

Answer:

.00

(Because it perfectly shows that there is no any relationship exists.)

QUESTION 5

If r = 1.00, which one of the following will be true?

Answer:

Scores on Y can be perfectly predicted from scores on X.

(We know that if r = 1, then relationship is positive perfect.)

QUESTION 6

In concept, a regression line is most closely related to which descriptive statistic?

Answer:

Range

(Explanation: If we predict the value for dependent variable outside the range of given data, the problem of extrapolation occurred.)

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