CHAPTER 8 EXERCISES

CHAPTER 8 DISTRIBUTIONS

8.1.2 Standardizing with Z-scores

Calculate the probability P(Z<0.43) - i.e. what is the probability of standard normal variable taking a value less than 0.43?

## [1] 0.6664022

Calculate the \(Z\)-score satisfying P(Z<z)=0.80 - i.e. what value is at the 80th percentile of a standard normal distribution?

## [1] 0.8416212

8.4.2 Normal approximation to the binomial distribution

Calculate the probability P(X<=39) when X has Bin(n=400, p=0.145) distribution.

## [1] 0.003025954