Measurement and Methodology-Statistical Procedures [GRE (Graduate Record Examinations) Psychology]: Questions 3 - 6 of 27

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Question 3

Statistical Procedures

Question

MCQ▾

The amount of variance in scores accounted for by a correlation coefficient of -. 70 is

Choices

Choice (5)Response

a.

less than zero because the correlation is negative

b.

indeterminate because the correlation is negative

c.

14 % if the reliability of the measures is greater than . 70

d.

almost 50 % if the reliability of the measures is + 1.00

e.

70 % if the reliability of the measures is + 1.00

Question 4

Statistical Procedures

Question

MCQ▾

An IQ of 146 is approximately how many standard deviations from the mean?

Choices

Choice (5)Response

a.

2

b.

5

c.

3

d.

1

e.

4

Question 5

Statistical Procedures

Question

MCQ▾

In a normal frequency distribution, 32 % of the cases

Choices

Choice (5)Response

a.

fall between the mode and the median

b.

fall beyond 1 standard deviation above and 1 standard deviation below the mean

c.

determine whether the distribution is leptokurtic

d.

fall between 1 standard deviation above and 1 standard deviation below the mean

e.

fall beyond 2 standard deviations above and 2 standard deviations below the mean

Question 6

Statistical Procedures

Question

MCQ▾

If the GRE Psychology Subject Test had a standard error of zero, then a test taker that took the test two times would necessarily receive

Choices

Choice (5)Response

a.

two perfect scores

b.

two scores that were above the mean

c.

two scores that correlated perfectly with the test taker՚s aptitude

d.

the same score on each test

e.

a score equivalent to a z-score of 1 each time