# Normal Approximation

## Do I need to know the Normal Approximation?

Section 5.5: Normal Approximation to the Binomial Distribution The premise in our Larson textbook for using the normal approximation is that finding the binomial probability of an “less than x” or “greater than x” problem would be onerous – having to manually calculate each of the discrete values and then sum them up. They give …

## Normal Approximation & Continuity Correction Excel Worksheet

For those who prefer to work with Excel, here is a worksheet that may help. Enter your data into the blue cells. You may enter an “x” as well as the a and the b if you are asked for a between probability. The answers will be in the yellow cells. There is a link … ## Continuity Correction – Filling the cracks in the Normal Approximation to the Binomial

When we approximate a discrete distribution, such as the binomial, by a continuous distribution, such as the normal, we need to make adjustments so “things don’t fall in the cracks.” From the Central Limit Theorem, we know that a sample distribution from a population, even a non-normal one, becomes normal if the sample size is …