SOLUTION: I need help solving this problem Suppose that x has a binomial distribution with n = 15 and p = 0.3. Is the normal approximation reasonable for this binomial distribution?

Question 1131945: I need help solving this problem
Suppose that x has a binomial distribution with n =
15 and p = 0.3. Is the normal approximation
reasonable for this binomial distribution?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
No. One wants np to be at least 5 (or n(1-p) and it is 4.5 here.
Plus, the exact calculation is not that difficult with a calculator, even not using the binomial cdf function.
15C3*0.25^3*0.75^12
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