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Unformatted text preview: the height of the dot at each midpoint represents the frequency of the class Ogive:aka cumulative frequency graphhorizontal scale shows class boundariesvertical axis shows cumulative frequency or cumulative relative frequencyheight of each dot represents accumulated frequency at that point shows the rate of change ends in air Central Tendency: averages, mean, median, mode Variability: standard deviation, coefficient of variance Range = High – Low Position : deciles, quartiles Coefficient of Variation : Mean/Standard deviation x 100%; more variable = higher number Percentile = a measurement of position; what proportion of values are equal to or below a certain position Chebyshev’s Theorem : 1 (1/k2) Outlier :  An extremely high or low data value when compared to the rest; any score that falls outside the range from Q1 – 1.5IQR to Q3 + 1.5IQR  IQR = Q3 – Q1...
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 Spring '08
 ROBY
 Statistics, Standard Deviation, #, relative frequency

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