So the rule of thumb for a contingency table is you have the number of rows, so you have rows, and then you have your number of columns.

所以列联表的经验法则是你有行数，所以你有行，然后你有你的列数。

And the degrees of freedom, and this is the rule of thumb, the degrees of freedom for your contingency table is going to be the number of rows minus 1 times the number of columns minus 1.

和自由度， 这是经验法则，列联表的自由度将是行数减去 1 乘以列数减去 1。