Graphical show of information and measures of central tendency LECTU RE 2 Introduction ? Summaries of information ar presented in the results piece of lines, either in graphs, tabulates. ? The presentation method used depends on the entropy and the objectives of your study. ? Graphs are usually label and figures and both graphs and defers are played Introduction ? When deciding on how to present data, dilate the more or less raise or classical results (aspects of your report which you want your reader to counseling on) ? Avoid having withal many pages of graphs or one circumvent after some other ? Both figures and tables should always have appropriate (brief) title and be labeled so that they stand alone ? When displaying your graphs and tables, always report your synopsis statistics e.g. mean determine, n, and one of the measures of dispersion; SD, Variance, or 95% cartel interval Frequency Table ? A table with on e column leaning events categories or values of the unsettled (x) and the other column listing their individual frequencies (f) or the itemise of times the values occur ? select the following data for the levels of sulphur dioxide in the rainfall (ml/ liter of rainwater): 0.7; 0.9; 0.9; 0.7; 0.8; 0.7; 1.0; 0.8; 0.8; 0.9; 0.7; 1.2; 0.6; 0.5; 0.8; 1.0; 1.0; 0.8; 0.6; 0.
8 ? ?f =n = 20 Frequency table x 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 f 1 2 4 6 3 3 0 1 Frequency table ? Where the data whitethorn be a bouffant matter of values, display data in classes of equal sizes e.g. 0.40-0.49; 0.50-0.59; 0.60-0 .69 and so forth This is called group frequ! ence distribution ? Number of classes (Generally recommended to use 5-20 classes) ? Width of classes: Related to number of classes Approx. class width = [Largest Data value- Smallest ]/Number of classes Frequency table ? whitethorn reveal the following: ? The range of frequencies observed ? about where most points lie ? Variability among frequencies- do all values listed in...If you want to have got a full essay, order it on our website: OrderCustomPaper.com
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