Question 694410: according to a transport sector conference in New zealand, 75% of workers drive to work. suppose a random sample of 200 of workers is taken.
a. what is the probability that between at least 135 but no more than 160 drive to work?
b.what is the probability that less than 120 workers drive to work?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! according to a transport sector conference in New zealand, 75% of workers drive to work. suppose a random sample of 200 of workers is taken.
---------------------------------------
Binomial Problem with n = 200 ; p(drive) = 0.75
-----
a. What is the probability that between at least
135 but no more than 160 drive to work?
P(135<= x <=160) = binomcdf(200,0.75,160)-binomcdf(200,0.75,134) = 0.9527
===============================
b.what is the probability that less than 120 workers drive to work?
P(0<= x <=120) = binomcdf(200,0.75,119) = 0.000001079
==================
Cheers,
Stan H.
|
|
|
