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1. From the Main Menu, enter the RUN • MAT mode.
2. Press the keys as follows.
*(STAT)(DIST)(NORM)
(NPd)( { )@AB
( } )@DAU
• For details about what you can do with the distribution function and its syntax, see
“Performing Distribution Calculations in a Program” (page 8-29).
I 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.
*(STAT)(S • Dev)*)
(LIST)(List)@(List)AU
* fx-7400G
II: ( STAT)(S • Dev)
)(STAT)(Var)*)
(LIST)(List)@(List)AU
* fx-7400G
II: ( STAT)(Var)