Notes

Outline

Statistics 2 Frequency Sherril M. Stone, Ph.D. Department of Family Medicine OSU-College of Osteopathic Medicine

Frequencies, Proportions, Percentages Frequency - number in a particular category Proportion - number in category/total number Percentage - Proportion * 100 Write in descending order - highest to lowest Count number in each variable Grouped Frequency Distributions Choose groups Write in descending order - highest to lowest Count number in each group Add groups for total number

Example Major             (freq) (proportion)               % Psychology               27            27/124=.2178               21.78% Chemistry                 54             54/124=.4355            43.55% Biology                     43            43/124=.3468            34.68%                         n = 124                         1.0001                  100.01%

Graphing Frequencies Title the graph and label each axis Histograms continuous variables bars are placed at the true limits and are connected Frequency Polygon continuous variable points at midpoint and then connected Bar graph categorical (discrete) variable Category names on X axis, bars do not touch Line graph – not for frequency data

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