Sir Ronald Aylmer Fisher FRS (17 February 1890 – 29 July 1962) was an English statistician, evolutionary biologist, geneticist, andeugenicist. Fisher is known as one of the chief architects of the neo-Darwinian synthesis, and for his important contributions to statistics, including the Analysis of Variance (ANOVA), method of maximum likelihood, fiducial inference, and the derivation of various sampling distributions. Anders Hald called him "a genius who almost single-handedly created the foundations for modern statistical science",[1] whileRichard Dawkins named him "the greatest biologist since Darwin".[2]
Learning Objectives Create and interpret frequency polygons Create and interpret cumulative frequency polygons Create and interpret overlaid frequency polygons Frequency polygons are a graphical device for understanding the shapes of distributions. They serve the same purpose as histograms, but are especially helpful for comparing sets of data. Frequency polygons are also a good choice for displaying cumulative frequency distributions . To create a frequency polygon, start just as for histograms , by choosing a class interval. Then draw an X-axis representing the values of the scores in your data. Mark the middle of each class interval with a tick mark, and label it with the middle value represented by the class. Draw the Y-axis to indicate the frequency of each class. Place a point in the
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