Thanks a lot, Gary!
Lei
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Gary Longton
Sent: Wednesday, March 22, 2006 12:47 PM
To: [email protected]
Subject: Re: st: functions for computing prob
It appears that I was mistaken about -tprob()-, that it does exist and
appear to
work, though undocumented and apparently obsolete. It looks to be the
2-tailed
version of -ttail()-
. di tprob(30,1.8)
.08192507
. di ttail(30,1.8)
.04096253
- GL
Gary Longton wrote:
> Lei Xuan wrote:
>
>> I am computing probabilities for t-test and z-test.
>> I want to know if the functions -tprob- and -normprob- are out-of-date
>> since no help files explain these functions. Are -ttail(n,t)- and
>> -normal(z)
>>
>> right functions to compute probs?
>
>
> see -help density functions-
> or -help functions-
>
> Yes, the cumulative normal density function, normprob(), still works but
> is out of date, no longer documented, and has been replaced by
> normal(). Am not sure whether tprob() ever existed? - doesn't seem to
> work and is not documented in any case. ttail(n,t) is documented under
> help for functions.
>
> - Gary
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