Calculating The Interquartile Range; Using Statistics - Casio fx-9860GII Instructions Manual

5.9 Calculating the interquartile range

Example 48
Calculate interquartile range for this data:
Number
1 2 3 4 5
Frequency
3 4 6 5 2
Press MENU . You will see the dialog box as shown on the right.
Choose 1: RUN·MAT and press
First calculate the summary statistics for this data (see Example 47).
( Note : The values of the summary statistics are stored after 1-Variable
Statistics have been calculated and remain stored until the next time they
are calculated.)
VARS
Press | F3 STAT|
The calculator now displays the result:
Interquartile range = Q

5.10 Using statistics

The calculator stores the values you calculate in One-Variable Statistics so that
you can access them in other calculations. These values are stored until you do
another One-Variable Statistics calculation.
Example 49
+ σ for this data:
Calculate x x
Number
1 2 3 4 5
Frequency
3 4 6 5 2
Press MENU . You will see the dialog box as shown on the right.
Choose 1: RUN·MAT and press
First calculate the summary statistics for this data (see Example 47).
( Note: The values of the summary statistics are stored after 1-Variable
Statistics have been calculated and remain stored until the next time they
are calculated.)
F1 F2
Press VARS | X |
The calculator now displays the result:
+ σ = 4.15 (to 3 sf )
x x
© Oxford University Press 2012: this may be reproduced for class use solely for the purchaser's institute
EXE
.
|
F3 GRPH | F6 F6 F1
– Q = 2
3 1
EXE .
σx
F5
x +
EXE
–
|
Q F6 F6 Q EXE
F4
3 1
Casio fx-9860GII
The interquartile range is the
difference between the upper
and lower quartiles (Q − Q
3
Using a graphic display calculator
).
1
45