Re: Help problem with MeanCI
- To: mathgroup at smc.vnet.net
- Subject: [mg5371] Re: [mg5343] Help problem with MeanCI
- From: Sherman Reed <Sherman.Reed at worldnet.att.net>
- Date: Thu, 5 Dec 1996 14:50:15 -0500
- Sender: owner-wri-mathgroup at wolfram.com
At 06:47 AM 11/27/96 +0000, you wrote:
>I am trying to use the MeanCI[list, options] .. I given the followin
>input...
>
>number of sbsences 0 1 2 3 4 5 6 7 8 9 10
>Frequency 1 4 8 10 8 7 5 3 2 1 1
>
>I am to pretend that the variance in unknown and use MeanCI to find out a
>95% confidence interval. I have no idea on how to do this... Can anyone
>please help.. Thanks..
>
>Students at the University of Maryland
>
<<Statistics`ConfidenceIntervals` I NEED THIS PACKAGE
TO DO
THE MEANCI FUNCTION.
IT IS DEFINED IN THE
GUIDE TO
STANDARD MMA PACKAGES.
data={0,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3, THIS IS THE DATA
WHERE I
N[MeanCI[data],4] NEXT I CALCULATE THE
MEANCI. WHEN THE VARIANCE
IS NOT KNOWN, IT IS NOT
STATED AND MMA USES THE
STUDENT T DISTRIBUTION
{3.43, 4.69} HERE IS THE RESULT
AND IT
LOOKS REASONABLE
WHEN I CALC THE MEAN
N[Mean[data],4]
4.06 THIS IS THE
CALCULATED MEAN
MOST HIGH SCHOOL TEXTS
ON STATISTICS HAVE GOOD
COVERAGE. I USED TRIOLA'S
ELEMENTARY STATISTICS
SIXTH EDITION
HOPE THIS HELPED
Sherman C. Reed