Ten pairs of duplicate spectrochemical determinations for nickel are presented below. The readings in column 2 were taken with one type of measuring instru- ment and those in column 3 were taken with another type.
Sample Duplicates
|
1
|
1.94
|
2.00
|
|
2
|
1.99
|
2.09
|
|
3
|
1.98
|
1.95
|
|
4
|
2.07
|
2.03
|
|
5
|
2.03
|
2.08
|
|
6
|
1.96
|
1.98
|
|
7
|
1.95
|
2.03
|
|
8
|
1.96
|
2.03
|
|
9
|
1.92
|
2.01
|
|
10
|
2.00
|
2.12
|
Test the hypothesis, at the 5 percent level of significance, that the two measuring instruments give equivalent results.