topic skew-log-normal distribution in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/skew-log-normal-distribution/m-p/44215#M1944 <HTML><HEAD></HEAD><BODY><P>In the past I&nbsp; had to calculate the probability that an observation from the standard normal distribution is less than or equal to x and I used the probnorm function. Now I have to calculate the same for a skew-log-normal distribution. How can I do?</P><P>Thank you for any help.</P><P></P><P></P></BODY></HTML> Tue, 27 Mar 2012 07:32:29 GMT Cinzia 2012-03-27T07:32:29Z skew-log-normal distribution https://communities.sas.com/t5/Statistical-Procedures/skew-log-normal-distribution/m-p/44215#M1944 <HTML><HEAD></HEAD><BODY><P>In the past I&nbsp; had to calculate the probability that an observation from the standard normal distribution is less than or equal to x and I used the probnorm function. Now I have to calculate the same for a skew-log-normal distribution. How can I do?</P><P>Thank you for any help.</P><P></P><P></P></BODY></HTML> Tue, 27 Mar 2012 07:32:29 GMT https://communities.sas.com/t5/Statistical-Procedures/skew-log-normal-distribution/m-p/44215#M1944 Cinzia 2012-03-27T07:32:29Z skew-log-normal distribution https://communities.sas.com/t5/Statistical-Procedures/skew-log-normal-distribution/m-p/44216#M1945 <HTML><HEAD></HEAD><BODY><P>I'm not sure what parameterization you have for your skewed lognormal distribution, but try the <A href="http://support.sas.com/documentation/cdl/en/lefunctionsref/63354/HTML/default/viewer.htm#n0n7cce4a3gfqkn1vr0p1x0of99s.htm">CDF function</A>, which supports the lognormal distribution.</P><P></P><P>In general, you should stop using the old PROB* distributions and switch to the newer CDF distribution, which sometimes supports a wider range of parameter values (for eexample, very small or very large parameter values).</P></BODY></HTML> Tue, 27 Mar 2012 13:02:39 GMT https://communities.sas.com/t5/Statistical-Procedures/skew-log-normal-distribution/m-p/44216#M1945 Rick_SAS 2012-03-27T13:02:39Z