MO5: First computer exercise Descriptive Statistics with Excel
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MO5: First computer exercise Descriptive Statistics with Excel
Descriptive Statistics with Excel. This exercise involves learning how to get data
into Microsoft's Excel, to compute descriptive stats and to draw histograms.
MO5: First computer exercise Descriptive Statistics with Excel This exercise involves learning how to get data into Microsoft’s Excel, to compute descriptive stats and to draw histograms. Most of the data are linked to the course web page http://www.maths.manchester.ac.uk/mrm/Teaching/OptoStats/
The first part of the week’s problems refer to the following sets of data, which you should imagine to be sets of intraocular pressures (in mm. Hg), measured from three different groups. These data are also listed in the file FakeIOP.xls linked to the course web page. Group A 14 18 17 13 15 14 16 19 22 16 17 18 15 18 16 15 17 16 20 17 16 19 12 17 14 16 19 15 13 15
Begin your work by downloading the data onto the hard disk of the machine you are using. There are some useful statistical tools hidden in Excel’s Tools → Data Analysis menu. You may first have to use the Tools → Add Ins → Analysis ToolPak menu item to get the Data Analysis tools to appear. 1. (Summary statistics Descriptive Stats Tool) The Tools → Data Analysis menu includes a very convenient Descriptive Statistics tool. Use it to summarize all three data sets. Then, as practice, use ordinary cell formulae to compute the mean, median, mode, standard deviation and interquartile range for data set C. 2. (Displaying the data with the Histogram Tool) The Tools → Data Analysis menu also includes a Histogram tool that can save a lot of labour. Using this tool, make histograms of these data using intervals of width 1 mm. Hg centered on the values { 11, 12, . . ., 23 } mm Hg.
