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12 Cards in this Set
- Front
- Back
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Characteristics of a Normal Distribution |
- Bell shaped - Symmetrical - Tails of the distribution never meet the x-axis - Mathematically defined |
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Measures of distributions: Kurtosis
Flat distributions: |
Platykurtic |
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Measures of distributions: Kurtosis
Peaked distributions: |
Leptokurtic |
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Measures of distributions: Kurtosis
Normal distribution: |
Mesokurtic |
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What is variance? |
Measure of spread of data about the mean - Mean of the squared deviations from the mean |
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Formula for variance |
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formula for standard deviation |
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In normal distribution what % of scores lie within -1SD and +1SD |
68% |
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z=? |
distance from mean/standard deviation |
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In a positive skew the peak is leaning? |
Leftwards |
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In a negative skew the peak is leaning? |
Rightwards |
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In a bimodal skew? |
Multiple peaks |
