1. Click the "Case Weight" button to define a weight variable and turn on the status to indicate the weighting variable is in use.

2.Select the "Weighted moments" check box beneath the Case Weights button. This option allows the user to specify that each observation contributes the weighting variable's value for that observation. The weight values do not need to be integers. This module can use fractional case weights in most computations. Some other modules use case weights as integer case multipliers or frequency values.

Note: When the "Weighted Moments" check box is selected, some statistics related to the moments can be based on the sum of the weight values for the weighting variable (W-1), or on the number of (unweighted) observations (N-1). The sums (and means), and sums of squares and cross products will always be based on the weighted values of the respective observations. In addition, several graphics options will not be available.