Can you help to find Probability(word==Helmet|class==Sports)= ? ID Words in Docu
ID: 2946011 • Letter: C
Question
Can you help to find Probability(word==Helmet|class==Sports)= ?
ID
Words in Document
in class=Sports
Training Set
1
Baseball Helmet Fans Strike
Yes
2
Football Helmet Touchdown
Yes
3
Hoops
Yes
4
Motorcycle Helmet Light
No
5
Helmet Ski
Yes
Test Set
6
Fans Helmet Helmet Ski
?
Pr(word==Helmet|class==Sports)= ?
ID
Words in Document
in class=Sports
Training Set
1
Baseball Helmet Fans Strike
Yes
2
Football Helmet Touchdown
Yes
3
Hoops
Yes
4
Motorcycle Helmet Light
No
5
Helmet Ski
Yes
Test Set
6
Fans Helmet Helmet Ski
?
Explanation / Answer
Different words when class = sports are
when ID = 1,2,3,5 (when values sports = Yes)
Words are,
Baseball, Helmet, Fans, Strike, Football, Helmet, Touchdown, Hoops, Helmet, Ski
Total words = 10
Count(Helmet) = 3
Thus, Pr(word==Helmet|class==Sports) = 3/10 = 0.3