Data 605 Discussion Week 9

Chapter 9, Page 339

10. Find the probability that among 10,000 random digits the digit 3 appears not more than 931 times.

x <- 931
n <- 10000
p <- 1/10
mu <- (n*p)

s2 <- n*p*(1-p)
s <- sqrt(s2)

S <- (x-mu)/s

pnorm(S)

## [1] 0.01072411