What is the error rate for the validation data, using the best pruned tree?

$2.$ Study the best pruned tree and develop a classification rule, using if$-$then statements.

$3.$ What is the difference in terms of number of nodes between the best pruned tree and full

tree?

$4.$ If you were to apply these trees to new data from the same source as these data, how

would you expect the error rate for the full tree to compare to the error rate for the best

pruned tree?

$5.$ Supposing the local government decided to levy tax based on the predicted class of

houses and the tax rate is fixed as:

$$ Class $1=$ $$250$

$$ Class $2=$ $$500$

$$ Class $3=$ $$800$