Sharp el-9950

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