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PAPER 2 - Statistical inference
Correlation
SRCC
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What does
SRCC
measure?
Rank correlation
between
bivariate
data for the population.
Hypotheses
for
SRCC
:
H0: There is no
rank association
between...
H1: There is a
positive/negative
/ a rank association between...
TS
for
SRCC
TS = SRCC value
What must be true for an
SRCC
?
sample must be
randomly selected
Exam technique for
SRCC
compare against
PMCC
understand that value shows
rank correlation
and not necessariley
linear correlation
can be combined with other
hypothesis tests
Why would
SRCC
be preferable?
doesn't require
bivariate normal
can be used for
qualitative data
if data is
monotonic
but not necessarily linear
data is already
ranked
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