Flashcards in Chapter 13 Statistics - Organising the Data Deck (38)

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## Variance

### Measure of dispersion - square of standard deviation

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## Standard Deviation

### Measure of dispersion - the square root of the sum of all squared deviations from the mean divided by N or N-1

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## Uncorrected (SD)

### Version of standard deviation or variance that is used if only wanting summary statistics for the group and not making population estimates (uses N as denominator)

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## Unbiased Estimate (of SD)

### Version of standard deviation or variance that is used for population estimates (uses N-1 as denominator)

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## Degrees of Freedom

### Common term in statistical analysis having to do with the number of individual data points that are free to vary given that overall summary values are known

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## Variation Ratio

### Measure of dispersion - proportion of non-modal values to all values

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## Sample Statistic

### Statistical measure of a sample (e.g. mean, standard deviation)

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