Howmuchofthevariabilityinchdmortalitycanbe

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 







or





 












 
 


 Coefficient
of
determina$on:

 2 
 

 
Interpreta$on:

tells
us
the
variance
accounted
for
 by
a
variable
in
the
other
variable
 
 


 r € Coefficient
of
determina$on,
example
 Correla$on
coefficient
between
variables,
X
and
Y
 
 
 
 
 
 
 
r
=

0.7
 2 
r 


=
0.49
 What
could
we
say
based
on
these
coefficients?
 € r2 •  X,
S,
r,





=
Mostly
descrip$ve
 € What
are
the
goals
of
sta$s$cs?
 Linear
Regression
 •  Linear
regression
allows
us
to
move
beyond
 correla$on
and
get
a
beVer
understanding
of
the
 rela$onship
between
our
variables
 –  How
fast
does
CHD
mortality
rise
with
a
one
unit
 increase
in
smoking?
 –  How
much
of
the
variabi...
View Full Document

Ask a homework question - tutors are online