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13 Cards in this Set
- Front
- Back
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descriptive stats
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used to summarize and describe data - generalizability & external validity
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frequency distribution
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shows number of times each value for the variable occurs
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mode
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score that occurs most frequently
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median
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"middle score" in a rank-ordered distribution
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mean
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sum of all scores divided by number of scores
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measures of central tendency
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mode, median, mean
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measures of variability
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range, variance, standard deviation
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range
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difference between highest and lowest values in distribution
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variance
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measure of variability within distribution
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standard deviation
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square root of the variance
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1 standard deviation
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one sided: 34%
two sided: 68% |
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2 standard deviation
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one sided: 47%
two sided: 95% |
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3 standard deviation
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one sided: 49%
two sided: 99.9% |
