EXERCISE NUMBER 6

pnorm(q = 0.43, mean = 0, sd = 1)

[1] 0.6664022

#> [1] 0.666
qnorm(p = 0.8, mean = 0, sd = 1)

[1] 0.8416212

#> [1] 0.842
# to see more options, type '?rnorm'

# calculate the probability P(X<=39) when X has Bin(n=400, p=0.145) distribution
pbinom(q = 39, size = 400, prob = 0.145, lower.tail = TRUE)

[1] 0.003025954

#> [1] 0.00303