165
Chapter 8: Statistics & Regression Calculations
16 x’
value or list
x’
Finds the estimated value of x for a given value of y by applying the
function determined by the regression.
Example
When the following is entered as statistical data:
x 10 20 30 40 50
y 20 40 60 80 100
Find estimated value of x given
y
= 140
.
1. Enter the above data into L1
(x) and L2 (y) and execute
Rg_ax+b (L1, L2).
2. Press
#
140
S
D
1
6
E
.
17 y’
value or list
y’
Find the estimated value of y for a given value of x by applying the
function determined by the regression formula.
Example
Using above data, find the estimated value for y given
x = 80
,
100
.
1. Press
#
@
{
80
,
100
@
}
S
D
1
7
E
.
•
16 x’ and 17 y’ will be valid
after executing a regression calculation excluding 2nd, 3rd, 4th,
degree polynomial, logistic, and sine regressions.
The following table shows the relationship between the time and
temperature of water, when heating a beaker filled with water.
Time
(min) 2 3 4 5 6 7 8 9 10
10.5
11
11.5
12
12.5
Temperature 38.4 46.4 54.4 62.5 69.6 76.1 82.4 88.6 93.4 94.9 96.5 98.2 99.1 100
(°C)
Using the
regression
functions
