The marks scored by 4 students in Mathematics and Physics...
The marks scored by 4 students in Mathematics and Physics are ranked as shown in the table below
Mathematics | 3 | 4 | 2 | 1 |
Physics | 4 | 3 | 1 | 2 |
Calculate the Spearmann's rank correlation coefficient.
0.2
0.5
0.6
0.7
Correct answer is C
Maths (x) | Rank rx | Physics (y) | Rank ry | d=|rx−ry| | d2 |
3 | 2 | 4 | 1 | 1 | 1 |
4 | 1 | 3 | 2 | 1 | 1 |
2 | 3 | 1 | 4 | 1 | 1 |
1 | 4 | 2 | 3 | 1 | 1 |
Total | 4 |
ρ=1−6∑d2n(n2−1)
1−6×44(42−1)=1−2460
= 1−0.4=0.6
If α and β are the roots of 2x2−5x+6=0, find the equation whose roots ...
The line y=mx−3 is a tangent to the curve y=1−3x+2x3 at (1, 0). Find the value ...
Which of the following is the semi-interquartile range of a distribution? ...
If 3xC2=15, find the value of x?...
Solve the inequality x2−2x≥3...