Question
Marks obtained in Maths and Economics obtained by six students are given below. Calculate rank co-efficient.
|
Students |
Marks in Maths |
Marks in Economics |
|
A |
85 |
60 |
|
B |
60 |
48 |
|
C |
55 |
49 |
|
D |
65 |
50 |
|
E |
75 |
55 |
|
F |
90 |
62 |
|
N = 6 |
Solution
Calculation of Rank Correlation
|
Marks in Maths X |
R1 |
Marks in Economics Y |
D1(R1–R2) |
D2 |
|
|
85 |
2 |
60 |
2 |
0 |
0 |
|
60 |
5 |
48 |
6 |
–1 |
1 |
|
55 |
6 |
49 |
5 |
1 |
1 |
|
65 |
4 |
50 |
4 |
0 |
0 |
|
75 |
3 |
55 |
3 |
0 |
0 |
|
90 |
1 |
62 |
1 |
0 |
0 |
|
1 |
ΣD2 = 2 |
