Posted by Anonymous on Tuesday, March 22, 2011 at 8:30pm.
Data shows that 88% of the people in a certain population are righthanded. A group of 7 people from this population are selected at random.
(a) What would be the expected value for the number of righthanded people in the group?
(b) What is the probability that exactly 5 of the people in the group are righthanded?
(c) What is the probability that at least 5 of the people in the group are righthanded?

statistics  MathGuru, Wednesday, March 23, 2011 at 7:14pm
(a) Take sample size times .88 for expected value.
(b) Use a binomial probability table. Values are: n = 7, x = 5, and p = .88
(c) Use the table again. Find x = 5,6,7. Use same values for n and p. Add together for total probability.
I hope this will help get you started.
Answer This Question
Related Questions
 statistics  Data shows that 93% of the people in a certain population are right...
 Statistics  Onefifth of the population is lefthanded. A random sample of 20 ...
 statistics  according to data from the american medical association, 10% of us ...
 statistics  Assume that 90% of the general population is righthanded. Suppose ...
 8th grade  People can be lefthanded, righthanded or ambidextrous. The number ...
 Math  Approximately 1 in every 10 people is left handed. How many left handed ...
 probability  90%of a countrys population are a right handed . what is the ...
 statistics  A specific study found that the average number of doctor visits per...
 statistics  Suppose that in a large population the proportion of people that ...
 7th PreAlgebra Word Problem  Approximately oneseventh of the people in the ...
More Related Questions