This  CROSS TABULATION program will allow the user to tabulate any
two variables contained within a standard SPPC raw data file.  If 
you are not familiar with the structure of  the  raw  data  files
used by the SPPC you should return to the LEARN program and study
that section of the SPPC manual.  

CROSSTAB allows for two types of data, catagorical and  continous
data.   Should  your  data  file  contain continuous data you may 
easily catagorize it into class  intervals  should you decide.  

Once  you  have  entered  the  name  of  the  your  raw data file
(preceded by dirve and path if neccessary) and have confirmed the 
file selected, you will be prompted to select the  two  variables
that  you wish to tabulate.  Even if your data file contains only 
two variables you will be prompted to  select  the  variable  you
wish  to  regard  for  each  dimension.  This is because crosstab 
cannot   tabulate   class   intervals   only   for   the   second
variable/dimension.   This  further  allows  you to "rotate" your 
tabulation  results.   CROSSTAB  can,  however,  tabulate   class
intervals  for  either  the first variable/dimension only or both
variables together.  

Should you decide to define class  intervals,  the  program  will
first  read  your  data file to determine the minimum and maximum 
values of the selected variables.  Once this has  been  completed
you  will be presented with a menu to define either the number of 
class intervals or the size of each class interval.  If you  wish
to  define  class intervals for the first variable ONLY, make the 
appropriate selection at this menu and then  press  the  '*'  key
when  prompted to define class intervals for the second variable. 
The name of each variable  is  presented  above  the  menu.   The
tabulation  process will then begin.  If you press the '*' at the 
first variable this tells the program that you wish to  exit  and
will return you to the main CROSSTAB menu.  

After the data file has been read for the second time, or if you
had declined to define class intervals you will be offered your choice
of screen output:

          Summary
          Row Percentages
          Column Percentages 
          Total Percentages
          Expected Values
          Final Statistics  

Selecting SUMMARY output will display the  cell  frequencies  for
each of the two variables selected. 

Selecting either of the ROW PERCENTAGES,  COLUMN  PERCENTAGES  or
TOTAL  PERCENTAGES  will  compute  and  display  those respective
percentages. 

Selecting  the  EXPECTED  VALUES option will display the expected
values for each of the observed calculated cells.  

Please note that in all  of  the  above  displays,  the  marginal
results reported are for the entire contingency program and do not
represent page totals.

Choosing  FINAL STATISTICS will display the chi-square statistic, 
the associated degrees of freedom and chi-square  probability  as
illustrated below.

        ╔══════════════════════════════════════════════╗
        ║                                              ║
        ║              CROSS TABULATIONS               ║
        ║                                              ║
        ╚══════════════════════════════════════════════╝

        ╔══════════════════════════════════════════════╗
        ║                                              ║
        ║       Number of rows    = 15                 ║
        ║       Number of columns = 10                 ║
        ║       Sample size       = 502                ║
        ║       Chi-square        = 148.26741          ║
        ║                                              ║
        ║       df                = 126                ║
        ║       Probability [p]  <= 0.08422            ║
        ║                                              ║
        ║       Pearson's C       = 0.47750            ║
        ║       Cramer's V        = 0.18115            ║
        ║       Tschuprow's T     = 0.16221            ║
        ║                                              ║
        ╚══════════════════════════════════════════════╝    


You will note that the CROSSTAB module will  present  your  final
tabulated  data  in  pages  having  dimensions  of  10 rows and 5 
columns.  Should the nature of your data  require  more  than  10
rows  and  5 columns, presentation will be from left to right and 
from top to bottom.   That  is,  all  computed  columns  will  be
presented for the first 10 or less rows. Then all columns will be
presented  for  the  next  10 or less rows and so forth.  You may 
abort the display of your computed results by  pressing  the  '*'
key.  Doing this will terminate the capture of data, as discribed
below, and return you to the display menu.

It  is  important  to note that the CROSSTAB program will save to
the PRINTER.WRK file only those portions of the final output that 
you select.  For example, let's assume that you've  read  a  data
file  and  that  you  wish to save only the Summary, Expected and 
Final results.  Then you MUST  select  the  Summary  option,  the
Expected  option  and the Final options of the OUTPUT menu before
exiting the program.  This procedure and a complete discussion of 
the printer.wrk file is discussed  in  length  within  the  learn
segment of the SPPC.


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The  following  screens  are actual screen dumps generated by the
CROSSTAB program.



                                                                    
                              CROSS TABULATIONS                     
                                   Summary                          
                               
                                                                      
                      variabletwo                                     
                                                                      
variableone           1.00   2.00   3.00   4.00   5.00        Total   
                                                                      
           1.00       3      0      0      2      0           5       
           2.00       2      2      0      3      5           12      
           3.00       2      1      2      2      0           7       
           4.00       1      1      3      2      1           8       
           5.00       0      2      1      0      2           5       
           6.00       2      0      3      3      0           8       
           7.00       1      1      0      1      0           3       
           8.00       2      1      0      0      3           6       
           9.00       0      2      2      2      3           9       
           10.00      1      0      3      0      0           4       
                                                                      
           TOTAL      18     11     23     22     28          102     
                               
                                                                    
                              CROSS TABULATIONS                     
                                   Summary                          
                               
                                                                      
                      variabletwo                                     
                                                                      
variableone           1.00   2.00   3.00   4.00   5.00        Total   
                                                                      
           11.00      0      0      2      0      4           6       
           12.00      0      0      3      0      2           5       
           13.00      1      0      0      1      3           5       
           14.00      1      1      1      2      3           8       
           15.00      2      0      3      4      2           11      
                                                                      
           TOTAL      18     11     23     22     28          102     
                                                                      
                                                                      
                                                                      
                                                                      
                                                                      
                      
                                                                    
                              CROSS TABULATIONS                     
                                Final Results                       
                      
                                                                      
                                                                      
                      
                                                                    
                       Number of rows    = 15                       
                       Number of columns = 5                        
                       Sample size       = 102                      
                       Chi-square        = 66.87417                 
                                                                    
                       df                = 56                       
                       Probability [p]  <= 0.15167                  
                                                                    
                       Pearson's C       = 0.62929                  
                       Cramer's V        = 0.40485                  
                       Tschuprow's T     = 0.29599                  
                                                                    
                      
