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October 25, 2014

Homework Help: statistics

Posted by Anonymous on Tuesday, March 22, 2011 at 8:30pm.

Data shows that 88% of the people in a certain population are right-handed. A group of 7 people from this population are selected at random.
(a) What would be the expected value for the number of right-handed people in the group?

(b) What is the probability that exactly 5 of the people in the group are right-handed?

(c) What is the probability that at least 5 of the people in the group are right-handed?

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