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F09Sess5 6s - IE/PSY 577 Descriptive Statistics Session 5...

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1 IE/PSY 577 Session 5 Statistical Methods 2 IE/PSY 577 Session 5 Florence Nightingale Made extensive use of statistical analysis in the compilation, analysis and presentation of statistics on medical care and public health. Was a pioneer in the visual presentation of information and statistical graphics . Elected the first female member of the Royal Statistical Society and became an honorary member of the American Statistical Association 3 IE/PSY 577 Session 5 Statistical Methods Descriptive Describe results of research Inferential Allow inferences about effects of variables, etc., using probability theory 4 IE/PSY 577 Session 5 Descriptive Statistics Frequency Distribution Relative Frequency Distribution Percentile Rank The percentage of scores that fall below a given percentile 5 IE/PSY 577 Session 5 Frequency and Relative Frequency Polygon 6 IE/PSY 577 Session 5 Descriptive Statistics Central Tendency Mean: 9, 3, 44, 17, 15 M = (9 + 3 + 44 + 17 + 15)/5 = 17.6
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