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# Psychology Module 5

TermDefinition
frequency distribution a list of scores ordered from highest to lowest
mode the score that occurs most frequently 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 sore of 100 points.
percentile rank A comparative statistic that compares a score to other sores 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.
Created by: NHS resource
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