SOLUTION: 1. If the probability of tossing a coin and getting head is 0.5, find the probability that in 100 tosses, 65 or more will be heads. Use the normal distribution to approximate the b

Algebra ->  Probability-and-statistics -> SOLUTION: 1. If the probability of tossing a coin and getting head is 0.5, find the probability that in 100 tosses, 65 or more will be heads. Use the normal distribution to approximate the b      Log On


   

Question 929946: 1. If the probability of tossing a coin and getting head is 0.5, find the probability that in 100 tosses, 65 or more will be heads. Use the normal distribution to approximate the binomial distribution.

0.0013

0.9981

0.0019

0.9987

None of the above
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
z =blue+%28x+-+mu%29%2Fsqrt%28blue%28p%281-p%29%2Fn%29%29 =blue+%28.65-.50%29%2Fsqrt%28blue%28.5%2A.5%2F100%29%29 = .15/.05 = 3
P(z > 3) = normalcdf(3,100) = .0013