A survey of property owners opinions about a streetwidening

A survey of property owners\' opinions about a street-widening project was taken to determine if owners\' opinions were related to the distance between their home and the street. A randomly selected sample of 100 property owners was contacted and the results are shown next. How many degrees of freedom are there?

Solution

Degrees of freedom (3-1)*(3-1) =2*2 = 4