Descriptive Statistics

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Descriptive Statistics

• Overview

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Mean
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Median
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Things to know .

• Means are sensitive to outliersuse 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)

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Spread
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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

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Frequency Output
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Frequency Output