*	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* 	Method 2: Using contingency table cell counts .
*	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

DATA LIST LIST /zone(f2.0) sprain(f2.0) count(f5.0) .
BEGIN DATA.
1 1 2
1 2 38
2 1 5
2 2 10
END DATA.

val lab 
	zone 		1 'Zone A'
			2 'Zone B' /
	sprain 	1 'Sprain'
			2 'No sprain' .

* Use LIST to show the structure of the data file .
list all.
* Only the 4 cell counts are used for this method.

* We must first WEIGHT the cases by the variable COUNT.

weight by count.

* Then we can run CROSSTABS as before.

crosstabs zone by sprain /stat=chisq.

* Finished.