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11. Linear regression
To access the linear regression mode you press
then a small REG appears
Example
Suppose we had a sample of 10 of the same type of banana. Their lengths and skin thicknesses
were measured. Below is a summary of the results.
Banana
Length (mm)
Thickness (mm)
STEPS
1. To put the calculator into regression mode press
(1 = Linear Regression; there are 5 other types)
2. Think of the sample of bananas as having two variables:
– let x be the variable length of banana
– let y be the variable thickness of banana
for entering the second set of data
1
2
3
4
16.2
15.8
16.5
14.9
1.1
1.2
1.1
1.0
Mastering the Calculator using the Casio fx-82MS
key once followed by
accesses the keys with
For entering the first set of data
5
6
7
16.9
16.8
15.6
0.9
1.2
1.1
once then
31
,
⎡ ⎤
in blue
8
9
10
15.6
15.7
15.4
1.2
0.9
0.8
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