Math 227 Statistics

Use the mean and standard deviation to give an interval that is very likely, say 95% chance, to cover the number rats that would actually die. (3 pts.) E(X) = mean of X = np = 100(.20) = 20 rats. SD(X) = standard deviation of X = = rats. When n is “large” the binomial probability distribution is well approximated by a normal distribution. ................
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