15
Press C when you have complete d the data entry stage.

Don‛t panic when the

scores disappear.

The pro cess for finding the mean and standard deviation is the
same as outlined in the example using scores without frequencies. In the scores
with frequencies example the mean is 5.1 and the standard deviation is 1.03.
The random number function
The calculator has two random numbe r features. Ran# generates 3-digit pseudo
random numbers between 0 and 1. R anInt generates random integers in a specifie d
domain.

Using Ran#

If you want the number to be displa yed as a decimal set the calculator to work in
LineIO. In MathIO the random nu mbers are displayed as fractions. Press
q.p and a random decimal will be displayed . Each time you press p another
random number will be displayed .

Random number formulas

Random numbers can be incorporate d into calculations.
For example, the formula 1 + 2 ´ Ran# will generate random numbers between 1 and
3. Each press of p will generate another random value between 1 and 3.

The RanInt function

To simulate the result of rolling a nor mal 6-sided die the formula RanInt#(1,6) is
required. Enter this formula as Q.1q)6)p. Each ti me you press
p another die simulation will be dis played.
The formula RanInt#(1,6) + RanIn t#(1,6) simulates the results of rolling a pair of
dice and adding the numbers show ing.