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1.Modifications Made to ALGEBRA 2.0 by STAT2
u u u u u Changes to the Function Menu
Installing STAT2 changes the function menu of the STAT Mode list input screen (initial
screen) as shown below.
Pressing a function key that corresponds to the added item displays a menu that lets you
select one of the functions listed below.
• 3(TEST) ... Test (Chapter 2, page 6)
• 4(INTR) ... Confidence interval (Chapter 3, page 31)
• 5(DIST) ... Distribution (Chapter 4, page 42)
The SORT and JUMP functions available with ALGEBRA FX2.0 are moved to the TOOL
menu (6 and 1) by STAT2.
u u u u u Calculation of the Coefficient of Determination (r
STAT2 adds calculation of the coefficient of determination (r
regression, and quartic regression. The following types of MSE calculations are also added
for each type of regression.
• Linear Regression ...
• Quadratic Regression ...
• Cubic Regression ...
• Quartic Regression ...
• Logarithmic Regression ...
2
2
2
) for quadratic regression, cubic
n
1
!
MSE =
(y
– (ax
i
n – 2
i=1
n
1
!
MSE =
(y
– (ax
i
n – 3
i =1
n
1
!
MSE =
(y
– (ax
i
n – 4
i =1
n
1
!
MSE =
(y
– (ax
i
n – 5
i =1
n
1
!
MSE =
(y
– (a + b ln x
i
n – 2
i =1
) and MSE
2
+ b))
i
2
2
+ bx
+ c))
i
i
3
2
2
+ bx
+ cx
+d ))
i
i
i
4
3
2
+ bx
+ cx
+ dx
i
i
i
i
2
))
i
2
+ e))
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