Question about Casio CFX-9850G Plus Calculator
How do i use this calculator to find the variance and standard deviation in a data set?
Part A shows you how to enter your data and calculate some statistical values. Keep in mind that the variance is the square of the standard deviation.
You can safely ignore the PART about REGRESSIONs until that time you need the information.
In the main menu select [STAT] icon to enter Stat mode and display the statistical data lists. Use the satistical data lists to input data and perform statistical calculations. Use the arrows to move the highlighting around the lists.
Exemple: Enter the following values in List 1
1st line enter 90 [EXE]
2nd line 85 [EXE]
3 79 [EXE]
4 75 [EXE]
5 70 [EXE]
6 68 [EXE]
7 56 [EXE]
When finished you press [F2:Calc], then [F1:1Var] and the statistical results appear on screen.
Title of screen : 1-Variable
x bar =74.7142857
Capital Sigma x= 523
Capita Sigma X squared = 39851
x lower case sigma n = 10.5249945
x lower case sigma n-1= 11.3682934
n = 7
Scroll down with Down arrow to access other data
Xbar -x lower case sigma n =64.1892911
x bar + x lower case sigma n = 85.2392802
All you have to do now, is to look at the theory you learned and interpret what these values mean.
Posted on Jul 25, 2010
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Posted on Jan 02, 2017
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