pnorm function

This function returns the value of the cumulative density function (cdf) of the normal distribution given a certain random variable q, a population mean μ, and the population standard deviation σ.

Syntax: pnorm(q, mean, sd,lower.tail) 

Parameters:

• q: It is a vector of quantiles.
• mean: vector of means.
• sd: vector standard deviation.
• lower.tail: It is logical; if TRUE (default), probabilities are otherwise

Example: In this example, we will be calculating the percentage of students at this school who are taller than 75 inches height of males at a certain school is normally distributed with a mean of μ=70 inches and a standard deviation of σ =3 inches using the pnorm() function in the R.

Output:

[1] 0.04779035

At this school, 4.779% of males are taller than 75 inches.

In this article, we will be looking at a guide to the dnorm, pnorm, qnorm, and rnorm methods of the normal distribution in the R programming language.