![]() The Interval is the class width (class interval),the First midpoint is the class midpoint of the first class.The resulting printout does not show class limits but does showclass midpoints and frequencies. Select the variable(s) by double-clickingin the list. (Grouped) Frequency distribution: Use Graph>CharacterGraphs>Histogram. The Stem-and-leaf and Dotplot commands always producecharacter graphs. B: Character Graphs:Ĭhoose the graph using the command as shown (the "Charactergraphs" option is at the bottom of the "Graph"menu list). If you areplotting several variables and want them all on the same scale(so you can compare them) choose the "Each column constitutesa group" option. Choose the variable(s)you want by double-clicking on them in the window. In the display, an extra column at the left of the displayshows the "depth" of the class - the distance (numberof items) from the nearer end (large or small) of the data.The row with the median is marked in parentheses.This is reallya character graph - it shows up in the Session window - it's onthe main graph menu because people use it a lot.ĭotplot: Use Graph>Dotplot. You can set the increment at 5 to get a splitstemplot. Selectthe variable(s) by double-clicking in the list at the left ofthe window. To select the symbols to use, click on the "Edit Attributes"button - you can choose a symbol (circle, plus, star, etc.) foreach group in the popup menu of the window that opens. Under "Data display" (in the window)use the popup menus to select Display symbol for each groupand enter the name of the column with the group variable (thecolumn of M's & F's - or whatever) under "Group Variables". With the Annotation button you can give a titleto the graph and label the axes, with the Frame buttonyou can set the minimum and maximum x and y values for the axes.The Data display options are used for having different groups of points (data for males & females, perhaps) plotted with different symbols: You must have a column thatindicates which group each row comes from (might be column fullof M's and F's). You must specifythe variables for the vertical (response - y) and horizontal (predictor/explanatory- x) axes by moving the cursor to the correct box (with mouseor tab key) and either typing them in or double-clicking on yourchoices. The data values are onthe horizontal axis, the percentile labels (rather than z-values)are on the vertical axis (the spacing is arranged to match equalspacing of z-values).The "percentile" table in the Sessionwindow shows where the percentiles would be if the data were normally distributed (with the same mean and standarddeviation) ![]() ![]() Select the variable, leave the distribution choiceas "Normal".The graph will print with "confidencebands" around the 45-degree line. Normal probability plots: Use Graph>ProbabilityPlot. The variableto be plotted goes in Y - so the boxplot will be drawn vertically.If several side-by-side boxplots (for categories) are desired,the values must be stacked in one column, with a second columncontaining an index identifying the category from which each valuecomes. Any options you set will remain inplace for your session (until you Exit Minitab) unless youchange them.īoxplots: Use Graph>Boxplot. The number of classes or the values for eitherthe midpoints or the cutpoints. Whether the bars arelabeled by the class midpoints or cutpoints (classlimits) 3. the type of histogram (frequency,relative frequency, cumulative, etc.) 2. The Annotationbutton will let you write a title for your histogram. Select thevariable(s) by double-clicking in the list. For information on saving the results, see VI.Saving and printing your work A: The graphs you may want You can also get somewhat clunkygraphs drawn in the Session window (so they print with the sessionwindow) using the Character graphs commands (There is a Character graphs submenu at the bottom of the Graphmenu). Minitab produces two general types of graphs: the standardgraphing commands produce High resolution graphs whichuse graphics drawing methods and appear in special graph windows(but are not attached to the session file - so they have to besaved and printed separately). Minitab:Graphs Introduction to MINITAB in the Saint Mary's MicrocomputerLab IV.
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