1What kind of distribution is bell-shaped, symmetrical, with mean, median, and mode at the peak?
Normal Distribution
2What term refers to how many standard deviations a score is from the mean?
Z score
3Name the formula for Z scores
Z = (Y - Y bar)/SD
4If the Z is positive, where does the score fall?
Above the mean
5If the Z is negative, where does the score fall?
Below the mean
6If the Z is 0, where does the score fall?
On the mean
7What’s the conversion formula for raw scores?
Y = Y bar + Z(SD)
8What table lists the area under the curve for every Z score?
Z table
9Which column of the Z table is the Z score?
Column A
10Which column of the Z table is the area between the mean and the Z score?
Column B
11Which column of the Z table is the area beyond the Z score?
Column C
12Procedure for the area between two scores?
Column B for both scores, add percentages if Z scores are opposing, subtract if not
13Procedure for the percentile rank of a score above the mean?
Z score, Column C, subtract from 1 then convert to percentage
14Procedure for the percentile rank of a score below the mean?
Column C for the Z score, in percentage
15Procedure for the raw score from a percentile above 50?
Subtract from 1 to get Column C, find Z score then convert to raw score
16Procedure for finding the raw score from a percentile below 50?
Divide percentile by 100, use to find Z in Column A corresponding to C, convert to raw score