6-25
• Power Regression ..........................
• Sin Regression ...............................
• Logistic Regression ........................
u Estimated Value Calculation for Regression Graphs
The Statistics mode also includes a Y-CAL function that uses regression to calculate the
estimated y -value for a particular x -value after graphing a paired-variable statistical
regression.
The following is the general procedure for using the Y-CAL function.
1. After drawing a regression graph, press !5(G-SOLVE) 1(Y-CAL) to enter the graph
selection mode, and then press w.
If there are multiple graphs on the display, use f and c to select the graph you want,
and then press w.
• This causes an
x -value input dialog box to appear.
2. Input the value you want for x and then press w.
• This causes the coordinates for
x and y to appear at
the bottom of the display, and moves the pointer to the
corresponding point on the graph.
3. Pressing v or a number key at this time causes the
x -value input dialog box to reappear
so you can perform another estimated value calculation if you want.
• The pointer does not appear if the calculated coordinates are not within the display range.
• The coordinates do not appear if “Off” is specified for the “Coord” item of the Setup screen.
Se =
Σ
1
n – 2
i=1
n
(ln y
i
– (ln a + b ln x
i
))
2
Se =
Σ
1
n – 2
i=1
n
(ln y
i
– (ln a + b ln x
i
))
2
Se =
Σ
1
n – 2
i=1
n
(yi – (a sin (bxi + c) + d ))
2
Se =
Σ
1
n – 2
i=1
n
(yi – (a sin (bxi + c) + d ))
2
Se =
Σ
1
n – 2 1 + ae
–bx
i
C
i=1
n
y
i
–
2
Se =
Σ
1
n – 2 1 + ae
–bx
i
C
i=1
n
y
i
–
2
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