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April 18, 2014

Homework Help: CONDITIONAL PROBABILITY

Posted by PALLAVI on Thursday, April 5, 2012 at 11:24am.

65% of the employees in a firm are graduates and 35% did not receive any graduate trainig.
Among the graduates, 40% have an experience of less than 10 years. Similarly, 18% of the non graduate emplyees have an experience of more than 10 years.

The first question is construct the corresponding contignency tables.
answer: i did it like that

GRADUATES NON GRADUATES
EMPLOYESS 65% 35% (total=100)
less thn 10 yrs 40% 25%(total 65)
mre than 10 years 17% 18% (total 35)

The toal of grduates column is 122, for non graduats is 78% for the total column is 200

The second question :what is the probability that an employee chosen randomly is a graduate or has an experience of more than 10 years?

for that second question:should i take 65/200 and 17/200?if yes,should i calculate it in terms of its percentage?? i mean 65/100*200 ??

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