no This is data mining related. Based on the table a) TRUE OR FALSE. Consider a

Question

no

This is data mining related. Based on the table

a) TRUE OR FALSE. Consider a generalized tuple of the type {A=V}, where A is outlook or temperature and V is chosen from the set of possible values of the corresponding attribute (according to the data). There exists a set of such generalized tuples that jointly cover all the tuples in the data from one class only.

b) Which formula applies to computing the entropy of the class distribution (class attribute is play)? I=-3/9*log(3/9)-(6/9)*log(6/9) OR I=-3/9*log(3/9)-3/9*log(3/9)-3/9*log(3/9)

c) How many near hits does the tuple <sunny, hot> have?

d) How many near misses does the tuple <overcast, mild> have?

outlook temperature play sunny hot no overcast hot yes rainy cool yes overcast cool yes sunny mild no rainy mild yes overcast mild yes sunny cool yes rainy hot

no

Explanation / Answer

a)True

b)

I=-3/9*log(3/9)-(6/9)*log(6/9)

I=-1/3*log(1/3)-(2/3)*log(2/3)

=-0.33log(0.33)-0.66log(0.66)

=-0.33(-0.48)-0.66(-0.18)

=0.18-0.11

=0.07

c)Tuple <sunny, hot> have

=1/4

d)tuple <overcast, mild> have

=1/4

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