Guide to Minitab

Guide to Minitab - Guide to Minitab Prof. Roman Frydman TA:...

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Guide to Minitab Prof. Roman Frydman TA: Yu-Wei Hsieh Taisuke Nakata 1. Import Data There are several ways to load data into Minitab. a. key-in data in the worksheet C1, C2…is the variable name. Labels can be added in the second row. You can also enter data in a copy-paste manner. b. Import data from files: If you successfully install Minitab you should be able to find several Minitab data file in: File >> open worksheet >> MINITAB Student 14 >> Student 14 Minitab also supports other types of data file such Excel or txt file.
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2. Graphing data with Minitab Introduction Minitab has a powerful graphics engine seamlessly integrated into the whole software. With Minitab, you can create simple graphs such as histograms and pie charts and more complicated ones such as empirical CDF and time series plots. Moreover, you can create graphs by groups and display them together with just a few clicks. In this session we will learn to create scatter plots, histograms, bar charts, pie charts, Pareto charts, dot plots, box plots and stem-and-leaf plots. Qualitative data graphs\ Pie Chart The pie chart is used when we want to quickly visualize the relative frequencies of a variable that is coded into categories. Load the file FORBES40 located in the Examples folder of the Student Resource CD 1. Go to Graph>Pie Chart … click on the categorical variables box and then select the DEGREE variable by either double clicking on it or clicking once and then pressing the Select button, now click OK. This will create a too-simple Pie Chart, with no frequencies or counts. Category None PhD Bachelors Law Masters MBA Pie Chart of DEGREE 2. Now let’s try improving that graph. Repeat Step 1 but instead of clicking OK, click on Labels…>Slice Labels and then check the first, third and fourth boxes, click OK and again OK. The graph should be the same as the one on page 42 of the book. We can also create pie charts of one categorical variable but grouping the observations by another categorical variable.
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Load the Ethics file located in the SIA folder of the Student Resource CD 3. Go to Graph>Pie Chart … click on the categorical variables box and then select the PREVUSE variable, click on Multiple Graphs…>By Variables and on the first box select SPEC, click OK (remember to label the pie as we did before) and click OK again. The graph should look the same as the one on page 46 of the book.
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Guide to Minitab - Guide to Minitab Prof. Roman Frydman TA:...

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