Using the Normal Curve Table

or not!

I want to show you why in 2023 nobody needs a normal curve table.

Example 1

Use the normal curve table to find the probability that a random variable with a standard normal distributiom has a value below 1.37.

Find the row for 1.3 then slide your finger across to the column .07 and find the value .91466.

Now do this using the pnorm() function.

Solution

pnorm(1.37)

## [1] 0.9146565

Exercise

Suppose you don’t have a computer with R installed.

Go to rdrr.io and enter the pnorm call. Use your phone.

On your way out, place your normal curve table in the recycle bin.