Since we talked about the females dealing with these two proportions lets talk about the males. There seems to be a very close connection between the two proportions because they fit close to exact of the regression line. Most of the points seem to be close together which could mean a relation. As you can see there seems to be a strong connection with having so many points of data close together on this one graph, this is like a layering effect. The data seems to be a linear line moving from the bottom going moving to right, there seems to be some negative direction going on here.
From looking at the residual graph above for the males dealing with their length of foot to their forearm. Having a higher number for X is causing the Y-YHAT to decrease. Also you can see that there is an obvious human error point up in the top right corner. |
Lets talk about the equation now. Y=2.816(X)-43.439. The equation is saying that for just males if the the length of the foot is at zero. right off of the back the length of the forearm is at a negative 43.43 centimeters. Each time as one centimeter is added to the foot of that person a total of 2.81 centimeters are added to the forearm.
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