Stats 2 Chapter 3 - Normal Distribution

Question 1

Under what circumstances is a normal distribution used?

Answer 1

• when n is large and p is close to 0.5, the binomial distribution can be approximated by the normal distribution
• tables for the binomial distribution only go up to n=50 so large values of n will be rejected on the calculator

Question 2

Continuity corrections

Answer 2

• used to approximate a discrete distribution using a continuous one
• refer to stats 2 chapter 3F on onenote for table of corrections