The number of boxes of girl scout cookies sold by each of the girl scout in a city has a distribution which is approximately normal with a mean=75 boxes and a standard deviation=30 boxes....
1.) find the probability that scout chosen at random sold between 60 and 90 boxes.
2.) Find the probability that the sample mea number of boxes of cookies sold by a random sample of 36 scouts is between 60 and 90 boxes.
My answers:
1.) .3830
2.) .9974
Just need to know if I am getting the right answers and if not then need the correct way to calculate....Im getting confused.
2 answers
Both answers are right! Good work!
78% of U.S. homes have a telephone answering device. In a random sample of 268 homes, what is the probability that fewer than 53 do not have a telephone anwering device?
3 answers