2. RANK CORRELATION
This method is finding out the lack of it
between two variables was developed by the
british Psychologist Charles Edward
Spearman in 1904.
In any event, the RCC is applied to a setof
ordinal rank no., with1 for the individual
ranked in quality, or quantity and so on , to n
for the individual ranked last in a group of n
individual.
3. RANK CORRELATION COEFFICIENT IS
DEFINED AS :-
R = 1 - 6∑D²/N³- N
Where r denotes RCC and D
refers To the difference of the
rank between paired items in to
series.
4. Rank correlation [when rank are not
given]
When we are given the actual data and
not the ranks, it will be necessary to
assign the ranks.
Ranks can be assigned by taking either
the highest value as 1 or the lowest
value as 1.
5. QUESTION..
Q. Calculate spearman’s coefficient of
rank correlation for the following data:
x : 53 98 95 81 75 61 59 55
y : 47 25 32 37 30 40 39 45
