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The RELIABILITY Procedure |

**DISTRIBUTION***probability distribution-name*

The ANALYZE, PROBPLOT, RELATIONPLOT, and MODEL statements require you to specify the probability distribution that describes your data. You can specify a probability distribution using the DISTRIBUTION statement anywhere after the PROC RELIABILITY statement and before the RUN statement. If you do not specify a distribution in a DISTRIBUTION statement, the normal distribution is assumed. The probability distribution specified determines the distribution for which parameters are estimated using your data. The valid distributions and the statements to which they apply are shown in Table 30.6.**Table 30.6:**Probability Distributions**Distribution****Distribution-Name Specified****Statement**binomial BINOMIAL ANALYZE exponential EXPONENTIAL ANALYZE, PROBPLOT, RELATIONPLOT, MODEL extreme value EXTREME | EV ANALYZE, PROBPLOT, RELATIONPLOT, MODEL generalized gamma GAMMA MODEL logistic LOGISTIC | LOGIT ANALYZE, PROBPLOT, RELATIONPLOT, MODEL loglogistic LLOGISTIC | LLOGIT ANALYZE, PROBPLOT, RELATIONPLOT, MODEL lognormal (base *e*)LOGNORMAL | LNORM ANALYZE, PROBPLOT, RELATIONPLOT, MODEL lognormal (base 10) LOGNORMAL10 | LNORM10 ANALYZE, PROBPLOT, RELATIONPLOT, MODEL normal NORMAL ANALYZE, PROBPLOT, RELATIONPLOT, MODEL Poisson POISSON ANALYZE Weibull WEIBULL ANALYZE, PROBPLOT, RELATIONPLOT, MODEL

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