SOLUTION: Use the normal approximation to the binomial to find the probability for n=50, p=0.9 and X <40. The probability is...

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Question 1081881: Use the normal approximation to the binomial to find the probability for n=50, p=0.9 and X <40.
The probability is...
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
mu=np=50%28.9%29
sigma%5E2=np%281-p%29=50%28.9%29%281-.9%29
Then generate a z score,
z=%2840-mu%29%2Fsigma
and use a normal distribution table or software to get the probability