We continue our analysis from previous problem set, this time examing the relationship between social class (CLASS) and spending on welfare (NATFARE).

	Social Class
Spending on Welfare	Lower Class	Working Class	Middle Class	Upper Class	Total
Too little	23	92	76	8	199
About right	12	113	133	10	268
Too much	12	127	99	7	245
Total	47	332	308	25	712

What is the number of degrees of freedom for this table