July7_09 - Psych 1 Principles of Psychology Statistical...

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Psychology 7e in Modules 1 1 Statistical Reasoning in Everyday Life Psych 1 P rinciples of Psychology 7/07/09 2 Statistical Reasoning in Everyday Life Describing Data, i.e. Descriptive Statistics square4 Measures of Central Tendencies square4 Measures of Variation square4 Correlation: A Measure of Relationships 3 Statistical Reasoning in Everyday Life Making Inferences, i.e. Inferential Statistics square4 When Is a Difference Reliable? square4 When Is a Difference Significant? 4 Describing Data A meaningful description of data is important in research. Misrepresentation may lead to incorrect conclusions.
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Psychology 7e in Modules 2 5 Measures of Central Tendency Mode:The most frequently occurring value in a distribution. Mean:The arithmetic average of values in a distribution obtained by adding the scores and then dividing by the number of values that were added together. Median:The middle value in a rank-ordered distribution.
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