Distributions

Question 1

rnorm(n, mean=0, sd=1)

Answer 1

Gaussian (normal)

Question 2

rexp(n, rate=1)

Answer 2

exponential

Question 3

rgamma(n, shape, scale=1)

Answer 3

gamma

Question 4

rpois(n, lambda)

Answer 4

Poisson

Question 5

rweibull(n, shape, scale=1)

Answer 5

Weibull

Question 6

rcauchy(n, location=0, scale=1)

Answer 6

Cauchy

Question 7

rbeta(n, shape1, shape2)

Answer 7

beta

Question 8

rt(n, df)

Answer 8

‘Student’ (t)

Question 9

rf(n, df1, df2)

Answer 9

Fisher–Snedecor (F ) (χ2 )

Question 10

rchisq(n, df)

Answer 10

Pearson

Question 11

rbinom(n, size, prob)

Answer 11

binomial

Question 12

rgeom(n, prob)

Answer 12

geometric

Question 13

rhyper(nn, m, n, k)

Answer 13

hypergeometric

Question 14

rlogis(n, location=0, scale=1)

Answer 14

logistic

Question 15

rlnorm(n, meanlog=0, sdlog=1)

Answer 15

lognormal

Question 16

rnbinom(n, size, prob)

Answer 16

negative binomial

Question 17

runif(n, min=0, max=1)

Answer 17

uniform

Question 18

rwilcox(nn, m, n)

Answer 18

Wilcoxon’s statistics

Question 19

r p d q

Answer 19

All these functions can be used by replacing the letter r with d, p or q to get, respectively, the probability density (dfunc(x, …)), the cumulative probability density (pfunc(x, …)), and the value of quantile (qfunc(p, …), with 0 < p < 1).