Casio Fx-82AU PLUS II User Manual page 13

Var: provides information about the number of scores, mean, standard and sample standard deviation
Minmax: provides information about the minimum and maximum scores, the median as well as the
upper and lower quartiles.
Pressing q1 allows you to move backwards and forwards through the options.
Continuing the previous example
To calculate the mean press q142 (for mean) then you MUST press = to bring up the value.
To calculate the standard deviation press q143 (for standard deviation) then you MUST press
= to display the value.
In this example the mean is 5.9 and the standard deviation is 2.8792 to 4 decimal places.
Entering scores with their frequencies
Press w and select statistics then press 1 for 1-variable statistics. If there is no frequency column
press qw then arrow down and choose STAT then 1 to turn the frequency on.
Example
Scores Frequency
4 9
5 12
6 5
7 2
8 1
Enter all the scores by pressing the value followed by =. The calculator automatically makes the
frequencies 1. Use the replay button to move to the frequency column. Highlight each frequency, one at
a time, then type the appropriate number followed by =.
Press AC when you have completed the data entry stage. The process for finding the summary statistics
is the same as that for finding statistics with frequency turned off. In this example the mean is 5.1 and
the standard deviation is 1.03.
© Sue Thomson and Shriro
This page may be photocopied for non-commercial use. Page 13