tikhonov meinte am 19. Aug, 14:49:
I get the point of clustering cars according to their price (into 'nice convertibles', 'luxury convertibles') like you did, but what sense does it make to fit a curve to the prices? Your explanatory variable (car type) is not even ordinal and the choice of models seems a little arbitrary to me... add a few more models in a similar price range and the fit will look much worse.
Mahalanobis antwortete am 19. Aug, 16:56:
The New York Times
listed the names and prices of the forty-seven convertible car models then available. Therefore, the argument that adding a few more models will destroy the relationship isn't valid. Car type isn't intrinsically ordinal but it can be ranked by, say, price ;-D.I think Howard Wainer did a great job in making the data accessible. Whether this relationship shows up each and every year is of secondary importance.
>>clustering cars.. like you did
I'd rather chew glass than use Comic Sans.
