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Blair-Broker, Thinking About Psychology, 3e, Module 3
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Terms in this set (13)
frequency distribution
A list of scores ordered from highest to lowest.
mode
The most frequently occurring score or scores in a distribution.
mean
The mathematical average of a distribution, obtained by adding the scores and then dividing by the number of scores.
median
The middle score in a ranked distribution; half the scores are above it, and half are below it.
skewed
Distorted; not evenly distributed around the mean.
range
The difference between the highest and lowest scores in a distribution.
standard deviation
A computed measure of how much scores vary around the mean score of a distribution.
normal distribution
A frequency distribution that is shaped like a symmetrical bell.
percentage
A comparative statistic that compares a score to a perfect score of 100 points.
percentile rank
A comparative statistic that compares a score to other scores in an imaginary group of 100 individuals.
correlation coefficient
A statistical measure of the strength of the relationship between two variables.
inferential statistics
Statistics that can be used to make a decision or reach a conclusion about data.
statistical significance
A statistical statement of how likely it is that a result occurred by chance alone.
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