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36 Cards in this Set
 Front
 Back
*Frequency Distribution

an organized tabulation (table or graph)of the number of individuals located in each category on the scale measurement. (a regular frequency distribution contains all the possible values of X and is usually arrnged from highest (top) to lowest (bottom).


Grouped Frequency Distribution

scores are groped into intervals rather than listed as individual values.


Range

the difference between the highest and lowest scores.


Class Interval

a group of scores in a grouped frequency distribution.


Aparent Limits

the score values that appear as the lowest and highest score in an interval


Histogram

a graph showing a bar above each score or interval so that the (height/vertical) of the bar corresponds to the (frequency) and the (width/horizontal) extends to the real limits (values of the variable)
*used for ordinal. interval, or ratio data *looks like bar graphs but the bars touch each other 

Modified Histogram

consists of stacks of blocks with each block representing one interval


Bar Graph

height of bar correspondes with frequency (space left between bars)


Polygon

a graph that consisted of lines that connest a series of dots that are placed above each interval so the height of the dot correspondes with frequency


Relative Frequency (proportion,p)

frequency reported in terms of the total number of scores.


Relative Frequency Distribution

displays the proportional (not exact) relationship of X values.


Symmetrical Distribution

the lefthanded side is a mirror image of the righthanded side


Skewed Distribution

the scores tend to pile up toward one end of the scale and taper off gradually at the other end


Positively Skewed Distribution

the scores pile up on the left side and taper off to the right.


Negatively Skewed Distribution

the scores pile up on the right side and taper off to the left


Tail(s) of distribution

a section on either side of a distribution where the frequency tapers down toward zero as the X values become more extreme


Percentile

a (score) that is described in terms of its percentile rank


Percentile Rank

a (percentage of individuals) with scores at or below the specific score


Cumulative Frequency (cf)

the (frequency of individuals) with scores at or below a specific score


Cumulative Percentage (c%)

the (percentage of individuals) with scores at or below a (particular point of distribution)


Interpolation

a mathematical procedure for (estimating a value) that is located (between two know values)


Stem and Leaf Display

a technique for (presenting a complete distribution of scores) in an (organized display) similar to a grouped frequency distribution table


Nominal and ordinal data are displayed using _________ not __________.

Bar graphs not Histograms


Central Tendency

a statistical measure where a single score defines the center of a distribution


Mean

the sum of the scores in a distribution divided by the number of scores


Weighted Mean

the sum of all the scores in more than one distribution divided by the TOTAL number if scores in the distribution


Median

the value that divides a distribution of scores exactly in half


Mode

1.the score or catagory that had the greatest frequency
2.the scores that have distinctly higher frequences 

Major Mode

a score or category that has the absolute highest frequency


Minor Mode

a score or category that has a relatively high frequency


Bimodal Distribution

a distribution with two modes


Multimodal Distribution

a distribution with multiple modes


Symmetrical Distribution

a distribution where a graph of the distribution has a righthanded side that is a mirror image of the lefthanded side


Skewed Distribution

a distribution where a graph of the distribution is not symmetrical


Positive Skew

a distribution where the graph of the distribution has a tail on the right side(+)


Negative Skew

a distribution where the graph of the distribution has a tail on the left side
() 