Saturday

March 28, 2015

March 28, 2015

Posted by **Danny** on Sunday, May 11, 2008 at 10:14am.

a) Build a tree diagram showing all the conditional probabilities and joint probabilities associated with the sex of the three new babies.

b) What rule of probability are you using to obtain the joint probabilities and why? In order to answer the “why” part of the question you must tell me why the rule of probability you chose to use applies in this case.

c) What is the probability of having one boy and two girls in the three births?

- Statistics -
**PsyDAG**, Sunday, May 11, 2008 at 10:35amPlease repost with completed question. Thanks for asking.

- Statistics -
**Damon**, Sunday, May 11, 2008 at 10:53ambinomial

p(r) = C(n,r) p^(r) (1-p)^(n-r)

here n = 3 , p=.6 (boy), (1-p)=.4 (girl)

p(0 boys) = 1*.6^0* .4^3 = .064

p(1 boy ) = 3 *.6^(1) *.4^2 = .288

p(2 boys) = 3*.6^2*.4^1 = .432

p(3 boys) = 1*.6^3*.4^0 = .216

I guess whatever your question might be, that might help.

**Answer this Question**

**Related Questions**

Statistics - Suppose you conduct a study and find that the probability of having...

statistics - Ignoring twins and other mutiple births, assume babies born at a ...

statistics - Based on data from the National Center for Health Statistics, N. ...

statistics - Using the descriptive statistics for the weight of the babies in ...

math - Assuming boy and girl babies are equally likely, find the probability ...

stats. - Based on data from the National Center for Health Statistics, N. Wetzel...

statistics - A 4 to 7 month old baby sleeps an average of 14 hours per day. At ...

statistics - A 4 to 7 month old baby sleeps an average of 14 hours per day. At ...

statistics - the wieights of newborn babies are distributed normally, with the ...

statistics - the weights of newborn babies are distributed normally, with the ...