An experiment to test the feasibility of reducing air pollution by modifying a gasoline mixture with very small amounts of certain chemicals A, B, C, and D was conducted and carbon dioxide was measured. The four different cars were used in this study.The gasoline mixtures were then randomly used in the cars.Please note that each car was randomly given one mixture per week and the end of the study, each car had used all the mixtures in a random order.Instead of giving you the raw data, I am giving you the partial result of my analysis. They are:SSTOT= 312.00;SScar=24.00;SSmixture= 40.00

What are the degrees of freedom for this F-Statistics?