# Marginal Probability

• Jun 15th 2009, 03:35 AM
mj.alawami
Marginal Probability
Suppose there are 40 students in a certain university and were asked wheather they are in favour of or against the wearing of school uniform.

Male-In favour (6)-Against(9)-Total(15)
Female-Infavour(17)-Against(18)-Total(25)
Calculate the Marginal Probability for
a)p(male),b)P(female),c)P(in favour),P(against)

Attempt
a)15/40=3/8
b)25/40=5/8
c)23/40
d)27/40

Am I correct?
Thank you
• Jun 15th 2009, 04:30 AM
mr fantastic
Quote:

Originally Posted by mj.alawami
Suppose there are 40 students in a certain university and were asked wheather they are in favour of or against the wearing of school uniform.

Male-In favour (6)-Against(9)-Total(15)
Female-Infavour(17)-Against(18)-Total(25) Mr F says: The total is 35 ....?
Calculate the Marginal Probability for
a)p(male),b)P(female),c)P(in favour),P(against)

Attempt
a)15/40=3/8
b)25/40=5/8
c)23/40
d)27/40

Am I correct?
Thank you

..
• Jun 15th 2009, 04:36 AM
mj.alawami
Quote:

Originally Posted by mr fantastic
..

Yes you are correct-didn't realize that mistake

**Female -favour (7)-Against(18)-Total(25)

Attempt:
a)15/40=3/8
b)25/40=5/8
c)13/40
d)27/40

Am I correct now ?
Thank you..