Chapter 6 Flashcards
Distribution
Any organized set of data
Transformation
Math procedure for converting a set of scores to a a different set
Frequency
How often a score occurs
Nominal
Name
Ordinal
Rank order, unequal intervals
Interval
Equal intervals, no true 0
Ratio
True 0
Continuous scale
Allows for fractions
Discrete scale
Only whole number amounts
Dichotomous scale
Only two amounts
Simple frequency distribution
Number of times a score occurs
Raw scores always where
X axis
Bar graph
Do not touch, nominal and ordinal data; discrete scales
Histogram
Bars touch; continuous scale; ratio and interval
Frequency polygon
Connect data points with a line; many subjects; ratio and interval
Normal curve
Symmetry
Tail of distribution
Where extreme scores are
Kurtosis
How fat/skinny
Skewed
Not symmetrical
Negatively skewed
Extreme low scores
Positively skewed
Extreme high scores
Bimodal
Two humps
Rectangular
All frequencies are equal
Relative Frequency
Frequency over N
Frequency
Number of times a score occurs
Area under the curve
Percentiles, proportions, and relative frequencies
Cumulative frequency
Frequency of all scores at or below a particular score
Percentile
Percent of all scores at or below a certain score
