PPT - Rank Correlation | SSC CGL Tier 2 - Study Material, Online Tests, Previous Year PDF Download

 Page 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.
Page 3


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.
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.
Page 4


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.
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.
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.
Page 5


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.
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.
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.
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