Suppose we choose 12 people instead of the 5 . Find the mean and standard deviation of the number of right-handers in the group.
In a previous exercise, we determined that the selection of lefties could be considered _____.
Since our group consists of 12 people, and now we are considering a ____ number of righties, use B(___,0.87).
Let Y= _____
E(Y)=np=12(.87)=10.44 righties
SD (Y)=√npq=√12(.87)(.13)=1.16 righties