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12 Cards in this Set
- Front
- Back
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Count
Count({xi})=n |
The number of data values in a set
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Top m, Bottom m:
Topm{xi}={Xn‑m+1,…Xn‑1,Xn}; Botm{xi}={X1,X2,… Xm}; |
The set of the largest (smallest) m values from a set. May be generated via an SQL command
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Sum
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The sum of a set of data values
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Mean (arithmetic)
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The arithmetic average of a set of data values (also known as the sample mean where the data are a sample from a larger population). Note that if the set {fi} are regarded as weights rather than frequencies the result is known as the weighted mean.
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Mean (harmonic)
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The harmonic mean, H, is the mean of the reciprocals of the data values, which is then adjusted by taking the reciprocal of the result. The harmonic mean is less than or equal to the geometric mean, which is less than or equal to the arithmetic mean
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Mean (geometric)
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The geometric mean, G, is the mean defined by taking the products of the data values and then adjusting the value by taking the nth root of the result. The geometric mean is greater than or equal to the harmonic mean and is less than or equal to the arithmetic mean
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Mean (power)
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The general (limit) expression for mean values. Values for p give the following means: p=1 arithmetic; p=2 root mean square; p=‑1 harmonic. Limit values for p (i.e. as p tends to these values) give the following means: p=0 geometric; p=‑∞ minimum; p=∞ maximum
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Mode
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he most common or frequently occurring value in a set.
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Median, Med
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The middle value in an ordered set of data if the set contains an odd number of values, or the average of the two middle values if the set contains an even number of values.
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Mid-range, MR
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The middle value of the Range
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Root mean square (RMS)
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The root of the mean of squared data values. Squaring removes negative values
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Range
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The difference between the maximum and minimum values of a set
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