Drawing Multiple Graphs Using The List Function - Sharp EL-9900 Operation Manual

7 stdDv(
8 varian(
Standard deviation and variance

5. Drawing multiple graphs using the list function

Using list items as coordinates, you can simultaneously draw multiple graphs.
stdDv( list [, frequency list] )
Returns the standard deviation of the specified list items.
Example
• Calculate the standard
deviation using the list items
of list L2.
varian( list [, frequency list] )
Returns the variance of the specified list items.
Example
• Calculate the variance using
the list items of list L2.
Standard deviation: s =
n
∑
(l
Variance =
k
k = 1
–
n
where n = number of list items
= list item value
l
k
m = mean value of the list
1. Press Y.
2. Enter the equation;
- +
2
Y1 = {3, 2}x
Variance
2
–
m)
1
+
{5, 3}x {2, 4}
Chapter 9: List Features
141