Normal and Skewed distributions

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4 Terms

1
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Normal distribution

  • symmetrical bell shaped curve where most people are in the middle area

  • mean, median, mode are all at same central point

  • data is normally distributed

2
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Positive skew

  • most of the distribution is concentrated on the right

  • may be the result of a very hard test

  • mean at the bottom end closest to the right (average) and mode at the top

3
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Negative skew

  • most of distribution is on the left

  • may be result of a very easy test

  • mean at the bottom end closets to the right (average) and mode at the top

4
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Skewed distribution

spread of frequency data that isn’t symmetrical, data all clusters ta one end