Chapter 2 Flashcards Preview

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Flashcards in Chapter 2 Deck (14):
1

Frequency distribution

Number of cases observed at each score value

2

Relative frequency distribution

Proportion (like a percentage) of each scores frequency

3

Class interval

Segment of the measurement score that has more than one possible score value (such as a A containing marks between 80-100)

4

Cumulative frequency distribution

The entry for a score value/class interval is the sum of the frequencies for that value plus the frequencies of all lower score values. It's the total number of frequencies. Frequency of the lowest value + second lowest = second lowests' cumulative frequency

5

Cumulative relative frequency distribution

The values cumulative frequency divided by the total number of cases

6

Stated limits

Highest and lowest score values in an interval

7

Minimum size of class interval

Range ÷ max # of class intervals from table 2.7

8

Upper/lower real limit

.5 subtracted from the lowest #, and .5 added to the highest #

9

Size of a class interval

Upper real limit - lower real limit

10

Midpoint of a class interval

Middle of an interval's real limits. (0.5 * interval size) + lower real limit

11

Central tendency

A typical, representive score (often the highest point on a bell curve)

12

Variability

The extent in which a score deviates from the central tendency

13

Skewness

Scores being bunched to one side of the central tendency

14

Kurtosis

Curvedness or peakness of a graph