introductiontominitab(英文版)-全文預(yù)覽

　　

【正文】 variable.Both Xs in this case are categorical (discrete) variables. Categorical Xs are also called factors. Different groups within a factor are called factorlevels.The factorlevels for Period are in C1.The factorlevels for Operator are found in the title columns C2C5 (AndrewEdmund).MINITAB can do a few basic analyses with the data structured as shown, it is preferable to have all factorlevels of each X variable in a single column.Manip Stack Blocks1. Manip Stack/Unstack Stack Block of Columns2. Fill in the dialog box as shown below:3. ClickTo convert this table to a single column format, you can use either the Stack Blocks mand or the Stack Rows mand. These mands will order your data differently, but place all data in two X columns and a Response column.We will use Stack Blocks to place all data from AndrewEdmund in a single column ’Distance’. For each Operator’s Distance we will carry data from the column Period. These blocks of data (each bination of Period and Operator’s Distance) are all stacked on top of each other into the two columns Month and Distance. You have the option of storing subscripts (an integer which identifies each block of data stacked).Reanize Data from ‘Excel Tables’ to a ‘Column Format’Manip Codeo The data in the first five columns contains the same information as the data found in C68. o You can make the data in the Month column more descriptive by coding the data as follows:1. Manip Code Numeric to Text2. Fill in the dialog box as shown below:3. ClickWhen there are less than eight categories to recode, use the Code mand in the Manip menu.When the number of categories exceeds eight, you can create a conversion table instead.Relabeling Data to Improve InformationManip Change Data TypeChanging from Text to Date/Time1. Manip Change Data Type Text to Date/Time2. Fill in the dialog box as shown below:While the column is now relabeled with each Month, it is not recognized as a date.To have MINITAB recognize this column as a date value, you will need to change the data type from Text to Date/Time.The Month column has now changed from text (C6T) to Date (C6D).Why change to a date format? Some graphs (Plot) only permit numeric and date/time values. So, changing to this format allows you to create a plot of Distance by Month for each Operator.3. ClickManip Code1. Manip Code Numeric to Text2. Fill in the dialog box as shown below:3. ClickThe subscript created in Stack Blocks can be recoded to identify the Operator with reference to the distance clocked.Relabeling Data to Improve InformationClearing and Deleting DataBackspace and Delete KeysErase the contents of the columns we have just created without erasing the titles:1. Place your cursor in row 1 of C6 (Month)2. Depress the Shift keyWhile holding down the Shift key:3. Press End [To highlight C6]4. Press the right arrow key twice[To highlight C7C8]5. Press Backspace or Delete[To clear the cells]Clear a Cell o Delete data, but preserve the “space”o In a numeric column, MINITAB inserts * in a cleared cell, unless it is the last cell in a columno Highlight the cells and choose Edit Clear Cells or press Backspace keyDelete one or more Cellso Delete the data and “space” and move other rows in the column upo Select the cells and choose Edit Delete Cells or press Delete key 1. Manip Stack/Unstack Stack Rows2. Fill in the dialog box as shown below:3. ClickNote that Stack Rows reanizes the data row by row, instead of column by column and repeats (expands) any X variable (Period) associated with the row. Therefore:A 1 2 3 4 5B 6 7 8 9 10Bees:A 1A 2A 3A 4A 5B 6B 7B 8B 9B 10This time, the subscript option was not chosen. In this case the subscript would indicate Period (row) rather than Operator (column). In essence, it would be redundant information.Manip Stack RowsAlternative Methods of Data ReanizationManip Stack RowsComparing the Order: Stack Rows vs Stack ColumnsOriginal DataStacked RowsSince we cannot use the subscript mand to generate information concerning the variable Operator, we will need to create this information in a different way.Notice that within Month (your new column), the first distance value es from Andrew, the second from Daniel, etc.It will be necessary to create a column of data that reflects the Operator in which the distance was taken. Selections that create columns of new or generat