Chapter 13 Statistics - Organising the Data Flashcards Preview

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Flashcards in Chapter 13 Statistics - Organising the Data Deck (38)
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31

Variance

Measure of dispersion - square of standard deviation

32

Standard Deviation

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

33

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)

34

Unbiased Estimate (of SD)

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

35

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

36

Variation Ratio

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

37

Sample Statistic

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

38

Population Parameter

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