lesson 5 - normal approximation

Question 1

how do we calculate Standard deviation

Answer 1

Standard deviation can be calculated by 𝜎=√(npq)

Question 2

what is the condition for normal approximation

Answer 2

Condition for normal approximation = If X is a binomial random variable of n independent trials, each with probability of success p, and if np>5 and nq>5. This lets the binomial random variable be approximated by a normal distribution.