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The RELIABILITY Procedure |

**FREQ***variable-name*

The FREQ statement specifies a variable that provides frequency counts for each observation in the input data set. If*n*is the value of the FREQ variable for an observation, then that observation is weighted by*n*. The log-likelihood function for maximum likelihood estimation is multiplied by*n*. If*n*is not an integer, the integer part of*n*is used in creating probability plots.

You can also use the FREQ statement in conjunction with the NENTER statement to specify interval-censored data having a special structure; these data are called*readout*data. The FREQ statement specifies a variable in the input data set that determines the number of units failing in each interval. See "Weibull Analysis of Interval Data with Common Inspection Schedule" for an example using the FREQ statement with readout data.

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