Explain the basic statistical concepts in psychological testing.
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Descriptive statistics simply give a general picture of the scores in a given group. They include the measures of central tendency and the measures of variability. Another widely used inferential statistic is the correlation coefficient, which describes the strength of the relationship between two variables.
Make Inferences Based Upon Data: By using what's known as inferential statistics, researchers can infer things about a given sample or population. Psychologists use the data they have collected to test a hypothesis or a guess about what they predict will happen.
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