Casio fx-5800P - Manual (Page 81)

E-80
A Performing a Specifi c Regression Calculation
Example: To use the statistical data shown below to perform logarithmic regression to
obtain the correlation coeffi cient and the estimated value of y when x = 100
x y
29 1.6
50 23.5
74 38.0
103 46.4
118 48.9
1. Display the logarithmic regression calculation result screen.
z6(RESULT) 2(Reg)3(Log)
2. Press
J to return to the STAT editor screen.
3. Press
z1(/COMP) to display the COMP Mode calculation screen.
4. Determine correlation coeffi cient r and the estimated value of y when x = 100.
• Correlation Coeffi cient
z7(STAT) 2(VAR)
ccc4(r)
E
• Estimated Value of y when x = 100
100z7(STAT) 2(VAR)
ccc7(n) E
Note
• The r and n values produced by this example are for logarithmic regression because
we fi rst displayed the logarithmic regression calculation screen in step 1 before using
the commands to calculate the values were wanted. If you do not display a particular
regression calculation result screen fi rst, the values produced by the commands are for
linear regression by default.
• For details about statistical calculation commands, see “REG Mode Statistical Command
Reference” (page 80).
A REG Mode Statistical Command Reference
Mean and Standard Deviation Commands
n z7(STAT) 2(VAR) 1
Obtains the number of samples.
n = (number of x
i-data items)