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Topic: Re: Forwarded to the list (fwd)
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Bob Hayden

Posts: 2,384
Registered: 12/6/04
Re: Forwarded to the list (fwd)
Posted: Aug 29, 1996 8:45 PM
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I tried what Paul suggested and I don't think it does what Bill wants,
but I could be misinterpreting what he wants. My interpretation is
that he has data like this

x f

1 24
2 14
3 12
4 0
5 1

representing 50 numbers (all integers between 1 and 5 inclusive) and
he wants ONE mean for all 50 numbers. I do not get ONE mean from the
TABLE command. I can do this with a macro I wrote. See end of message.
I'd be curious if this is what Bill wanted and if the results below
are what Paul is getting by his method for this data.

----- Forwarded message from Paul James -----

I think what you are looking for is in the table command under stats.
1. go to - tables
2. cross tabulation
3. in Classification variables enter c1
4. trun on Frequencies are in box and enter c2
5 go to summaries, pick what you want (very limited and not all seem to work)
6. in associated variables enter c1 and you are off to the races

>>I'm using Minitab for my Statistics classes, and I was trying to do something
>>last night and got stuck. I have a list of data in column C1 and their
>>corresponding frequencies in column C2. I want to do descriptive statistics
>>on it, and I can't figure out how to tell Minitab that the frequencies are in
>>C2. All it will do is give me the statistics on C1, without using their
>>frequencies. I know that I'm probably being pretty thick headed and there is
>>something obvious that I'm missing, but I don't know what to do. I've read
>>the books and manuals that I have, and they don't seem to help. I'd also
>>like to make a normal probability chart of the data, and it isn't doing that
>>either. If it makes a difference, I'm using the student edition.
>>Can anyone tell me what I'm doing wrong? You'll have my eternal gratitude.
>>Bill Roloff

----- End of forwarded message from Paul James -----

MTB > set c1
DATA> 1 2 3 4 5
DATA> end
MTB > set c2
DATA> 23 14 12 0 1
DATA> end
MTB > execute 'stats1a/macros/vargroup'
Executing from file: stats1a/macros/vargroup.MTB

This macro computes the mean, variance, and standard
deviation of grouped data. The data values must be
stored in c1 and their frequencies in c2.
The results of all intermediate steps are printed out
to aid students in learning to do these computations
by hand. The macro will destroy any data stored in c2-c4,
k1-k7, and any name given to c1.


ROW x f xf resids. res.sq. res.sq.f

1 1 23 23 -0.84 0.7056 16.2288
2 2 14 28 0.16 0.0256 0.3584
3 3 12 36 1.16 1.3456 16.1472
4 4 0 0 2.16 4.6656 0.0000
5 5 1 5 3.16 9.9856 9.9856

MTB > print k1 The total =

K1 92.0000
MTB > print k2 number of observations =

K2 50.0000
MTB > print k3 mean =

K3 1.84000
MTB > print k4 The sum of the squared residuals =

K4 42.7200
MTB > print k5 degrees of freedom =

K5 49.0000
MTB > print k6 variance =

K6 0.871837

MTB > print k7 standard deviation =

K7 0.933722
MTB > end


| | Robert W. Hayden
| | Department of Mathematics
/ | Plymouth State College
| | Plymouth, New Hampshire 03264 USA
| * | Rural Route 1, Box 10
/ | Ashland, NH 03217-9702
| ) (603) 968-9914 (home)
fax (603) 535-2943 (work)

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