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Descriptive Statistics

Descriptive Statistics. Overview. Mean. Median. Things to know …. Means are sensitive to outliers—use the median (outliers are extreme values) If the number of data points is odd , the median is the number in the middle.

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Descriptive Statistics

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  1. Descriptive Statistics Overview

  2. Mean

  3. Median

  4. Things to know …. • Means are sensitive to outliers—use the median (outliers are extreme values) • If the number of data points is odd, the median is the number in the middle. • If the number of data points is even, the median is the average of the numbers nearest the middle • When your data set is all categories, use the mode (mode is value occurring most often)

  5. Spread

  6. SPSS Steps • Open SPSS data file • Click on ANALYZE • Click on DESCRIPTIVE • Click on FREQUENCIES • Select variables of interest (ALL) • Click STATISTICS • Select preferred measures of central tendency and spread • Click CONTINUE • Click OK

  7. Frequency Output

  8. Frequency Output

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