Original_To:  JNET%"spssx-l@uga"
Original_cc:  KOLEH
Newsgroups: bit.listserv.spssx-l
Date:         Tue, 10 Nov 1992 13:30:00 O
Reply-To:     KOLEH@FINUJO.BITNET
From:         KOLEH@FINUJO.BITNET
Subject:      sampling

Hi!

Can anyone explain this? When I want a sample (perhaps 10%) from a population
of size 505, I almost every time get get a different result. Changing the seed
number does not help. Whereis the BUG??








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   1
13:14:02    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5

VAX                     SPSS VAX/VMS SITE                 License Number 60024
This software is functional through February 28, 1993.

Try the new SPSS Release 4.1/4.0 features:

* LOGISTIC REGRESSION procedure                  * CATEGORIES Option:
* EXAMINE procedure to explore data              *   conjoint analysis
* FLIP to transpose data files                   *   correspondence analysis
* MATRIX Transformations Language                * GRAPH interface to SPSS Graph
* ALL-IN-1 Interface To SPSS                     * LISREL7/PRELIS procedure

See the new SPSS documentation for more information on these new features.

   1  0  set seed = 1000005087
   2  0  get file talent

File JOYL$DUB1:[KOLEH]TALENT.SPSSXSAV;
   Created:   6-SEP-89 15:06:43 - 21 variables

   3  0  sample 0.1
   4  0  descriptive x1

There are 1,201,472 bytes of memory available.



74 bytes of memory required for the DESCRIPTIVES procedure.
2 bytes have already been acquired.
72 bytes remain to be acquired.








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   2
13:14:04    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5



Number of valid observations (listwise) =        58.00

                                                   Valid
Variable      Mean    Std Dev   Minimum   Maximum      N  Label

X1            3.02        .76      1.00      4.00     58  school size








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   3
13:14:04    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5


Preceding task required .28 seconds CPU time;  .68 seconds elapsed.

   5  0  get file talent

File JOYL$DUB1:[KOLEH]TALENT.SPSSXSAV;
   Created:   6-SEP-89 15:06:43 - 21 variables

   6  0  sample 0.1
   7  0  descriptive x1

There are 1,192,192 bytes of memory available.



74 bytes of memory required for the DESCRIPTIVES procedure.
2 bytes have already been acquired.
72 bytes remain to be acquired.








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   4
13:14:05    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5



Number of valid observations (listwise) =        66.00

                                                   Valid
Variable      Mean    Std Dev   Minimum   Maximum      N  Label

X1            3.05        .83      1.00      4.00     66  school size








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   5
13:14:05    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5


Preceding task required .26 seconds CPU time;  .46 seconds elapsed.

   8  0  get file talent

File JOYL$DUB1:[KOLEH]TALENT.SPSSXSAV;
   Created:   6-SEP-89 15:06:43 - 21 variables

   9  0  sample 0.1
  10  0  descriptive x1

There are 1,182,912 bytes of memory available.



74 bytes of memory required for the DESCRIPTIVES procedure.
2 bytes have already been acquired.
72 bytes remain to be acquired.








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   6
13:14:06    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5



Number of valid observations (listwise) =        35.00

                                                   Valid
Variable      Mean    Std Dev   Minimum   Maximum      N  Label

X1            2.94        .84      1.00      4.00     35  school size








10-Nov-92   SPSS RELEASE 4.1 FOR VAX/VMS
                                            Page   7
13:14:06    SPSS VAX/VMS SITE              on JOYL::            VMS V5.5


Preceding task required .21 seconds CPU time;  .50 seconds elapsed.

  11  0

    10 command lines read.
     0 errors detected.
     0 warnings issued.
     2 seconds CPU time.
     4 seconds elapsed time.
       End of job.

Osmo Kolehmainen
Department of Statistics
University of Joensuu
Finland
Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU