Casio FX-270W PLUS - Quadratic Regression

¢ Example:
Perform quadratic regression to de-
termine the regression formula terms
and correlation coefficient for the data
nearby. Next, use the regression for-
mula to estimate the values for / (es-
timated value of }) for vi = 16 and ¢
(estimated value of x) for yi = 20.
Ag
29 [18 |
| 50 | 23.5 _|
| 74 | 38.0 __
Enter REG mode (Quadratic regression)
fx-B5W: bog ooo) C2) () GS)
Other models: @ G) &) @
=]
290) 1.607 500) 23.57
740) 33.067103C) 46.4 &)
118G) 48.0 67) wee 1
(Regression Coefficient A) YS
(Regression Coefficient 8) ae = |
(Rlegression Coefficient C) cay =|
(f when wi = 16) 16 &y
(t, when vi = 20) 20 a CO
(t, when 1 = 20) far) (3)
Data Input Precautions
. inputs the same data twice.
e You can also input multiple entries of the same data us-
ing &4 (J. To input the data “20 and 30” five times, for
example, press 20) 30 @§ G@) 5 GD.
« The above results can be obtained in any order, and not
necessarily that shown above.
° To delete data you have just input, press & (cu).
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