Casio fx-180P Manual De Operación página 26

6-2 Regression analysis
' Set the function mode to "LR" by pressing E).
I Linear regression
Formula: y = A + 8x
B a n'2x1;— Zx-Ez
nozx —l£xl
n
n-Exy- 22x°£y
JIn-Xx' - tle'| {n-zty' - (xylil
f8
Ex.) Results from measuring the length and temperature of a steel bar.
temp. length
10°C 1003 mm
15 1005
20 1010
25 1008
30 1014
Find the constant term (A), regression coefficient (B), correlation coefficient (r) and
estimated values (5?. )7) using the above figures as a basis.
OPERATION READ-OUT
"LR" 91.210 10.
1003 1003.
1 51005 1005.
201010 1010.
251 008 . 1008.
301014@ 1014.
E . 998. (A)
0.5 (B)
E 0.919018277 ('1
(When the temp. is 18°C) 1 8 1007. (mm)
(When the length is 1000 mm) 1000121 4. 1°C)
Note: Ex". Ex, :1. 2y". 2y. Exy, f, xon, x0n.1, 7, you. yam. A. B and r are
key,
-25-