User Manual

6-22
1. From the Main Menu, enter the RUN • MAT mode.
2. Press the keys as follows.
K5(STAT) 3(DIST) 1(NORM)
1(NPd) !*( { ) b,c,d
!/( } ) ,b.f,c)w
• For details about what you can do with the distribution function and its syntax, see
“Performing Distribution Calculations in a Program” (page 8-29).
k Determining Standard Deviation and Variance from List Data
You can use functions to determine standard deviation and variance for specified list data. This
calculation is performed in the RUN • MAT (or RUN) mode. You can perform calculations using
data you saved to a list (List 1 to List 26) with the STAT mode List Editor or list data you input
directly on the RUN • MAT (or RUN) mode screen.
Syntax StdDev(List
n [,List m ])
Variance(List
n [,List m ])
List
n ........Sample data
List
m .......Frequency data
Example To store the
x -data below in List 1, the frequency values in List 2, and
determine the standard deviation and variance
x
60 70 80 90
Frequency 3 5 4 1
1. From the Main Menu, enter the STAT mode.
2. Use the List Editor to store the above data.
3. From the Main Menu, enter the RUN • MAT (or RUN) mode.
4. Press the keys as follows.
K5 (STAT)4 (S • Dev) *J
1(LIST) 1(List) b,1(List) c)w
* fx-7400G
II: 4(STAT) 3 (S • Dev)
J5(STAT)5 (Var)* J
1(LIST) 1(List) b,1(List) c)w
* fx-7400G
II: 4(STAT) 4 (Var)