PHA 335 Central Tendancy/Dispersion

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Last updated 11:31 AM on 9/24/26
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5 Terms

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Measures of Central Tendency

  • Mean

  • Median

  • Mode


2
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Measures of Dispersion

Used to describe how data are spread and provide information about variability in the distribution of observations

  • Standard Deviation (SD)

  • Interquartile Range (IQR)

    • 25 to 75 percentile

  • Range

    • Minimum to Maximum


3
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Mean and SD used?

NON-skewed Interval/Ratio

4
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Median and IQR used?

Ordinal OR skewed Interval/Ratio data

5
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Mode used?

Nominal Data