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Chapter 10: Statistics & Regression Calculations
15 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:
x10 20304050
y20 406080100
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 5 E.
16 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 6
E.
• 15 x’ and 16 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