Specify the scheme used to modify each numerical attribute. These schemes change the shape of the data distribution and/or normalize the data.
A set of numeric values is usually normalized by subtracting a measure of central tendency (such as the mean or median) from each value and then dividing the result by some measure of spread (such as the standard deviation, inter quartile range, or range). This yields data with a similarly shaped histogram with values centered around 0.
You can specify schemes for numeric attributes only; the numeric attributes are displayed in the grid. Statistics (skewness, kurtosis, mean, standard deviation)are displayed for each numeric attribute.
To view a histogram of an attribute, select the attribute, and click Histogram. The histogram display shows a histogram and some statistics for the attribute.
Click Select All to select all attributes and Clear All to clear all scheme definitions.
Schemes are defined one attribute at a time. To define a scheme for an attribute, select it and click Define.
You can copy and paste scheme from one attribute to one or more attributes using Copy and Paste. Copy and Paste are context sensitive: Copy is enabled only if one attribute is selected; Paste is enabled only if at least one destination attribute is selected.
To delete a defined scheme, select the attribute, and click Clear.
Use Select All to select all attributes and Clear All to delete all recode schemes.
Click Next when you have finished defining schemes.
Click OK to continue. The wizard validates that you have specified at least one scheme.
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