1

n

 

 

 

 

 

 

• Power Regression ..........................

 

Σi=1

 

 

 

 

2

 

MSe = n – 2

(lnyi

– (lna + b lnxi ))

 

 

 

 

 

 

 

1

n

 

 

 

 

 

 

• Sin Regression ...............................

MSe =

Σi=1

(yi – (a sin (bxi + c) + d ))

2

n – 2

 

 

 

 

 

1

n

 

C

2

 

 

• Logistic Regression ........................

MSe =

Σ

yi –

 

 

 

 

n – 2

1 + ae

–bxi

 

 

 

 

 

i=1

 

 

 

 

 

uEstimated 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.

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