Study your flashcards anywhere!
Download the official Cram app for free >
 Shuffle
Toggle OnToggle Off
 Alphabetize
Toggle OnToggle Off
 Front First
Toggle OnToggle Off
 Both Sides
Toggle OnToggle Off
 Read
Toggle OnToggle Off
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
A key: Read text to speech.a key
20 Cards in this Set
 Front
 Back
The horizontal, or X, axis of a graph.

Abscissa


Graph of the frequency distribution of nominal or qualitative data.

Bar graph


Distribution with two modes.

Bimodal distribution


A range of scores in a grouped frequency distribution.

Class interval


Frequency distribution graph of a quantitative variable with frequency points connected by lines.

Frequency polygon


Compilation of scores into equalsized ranges (class intervals) plus frequencies within intervals.

Grouped frequency distribution


Frequency distribution graph of a quantitative variable with frequencies indicated by contiguous vertical bars.

Histogram


Severely skewed distribution with mode at one extreme.

Jcurve


Graph that shows the relationship between two variables with lines.

Line graph


A mathematically defined, theoretical distribution or an empirical distribution with a particular bell shape.

Normal distribution (normal curve)


The vertical, or Y, axis of a graph.

Ordinate


Score obtained by observation or from an experiment.

Raw score


Scores arranged from highest to lowest, including each score's frequency.

Simple frequency distribution


Asymmetrical distribution; may be positive or negative.

Skewed distribution


The arithmetic average; the sum of the scores divided by the number of scores.
xbar,µ = ∑X/N or ∑fX/N 
mean


∑(XXbar)=0
∑(XXbar)^2=a minimum 
characteristics of the mean


The point that divides a distribution of scores into equal halves, so that half the scores are above it and half are below it.
median location=N+1/2 
median


mode

The score that occurs most frequently in a distribution.


*median is bigger than the mean
*large number of low scores *tale points to the right 
positively skewed curve


*median is smaller than the mean
*large number of high scores *tale points to the left 
negatively skewed curve
