6.7 normal as approximation to binomial Flashcards
1
Q
why is the continuity correction used?
A
bc a normal distribution is continuous and binomial distributions use whole numbers only
2
Q
what is the continuity correction?
A
+/- 0.5
3
Q
in a normal approximation of a binomial distribution, how is mean and standard deviation calculated?
A
mu = np sigma = SQRT npq
4
Q
what is a requirement of a binomial distribution in order for a normal approximation to work?
A
np >/= 5
nq >/= 5
