Prak komstat

norm<-function(x,miu,sigma)(1/(sigma*sqrt(2*pi))*exp(-1/2*((x-miu)/sigma)^2))
norm(750,800,50)

## [1] 0.004839414

dnorm(750,mean = 800,sd = 50)

## [1] 0.004839414

#expo
eks<-function(x,lamda){lamda*exp((-1)*lamda*x)}
eks(15,0.05)

## [1] 0.02361833

#untuk P
cdfexp <- function(x, lamda = 0.05) {
  pdf <-function(t) {
    lamda * exp(-lamda * t)
  }
  hasil <- integrate(pdf, lower = 0, upper = x)
  return(hasil$value)
}
cdfexp(15,0.05)

## [1] 0.5276334

uniform<-function(x,a=0,b=1){1/(b-a)}
uniform(20,a=10,b=30)

## [1] 0.05

dunif(20,min=10,max=30)

## [1] 0.05