Statistics: Understanding Correlation Coefficient (r) and Its Properties

r is always between ___ and ____

-1, 1; inclusive

if r=1 __________________

there is a perfect positive linear relation

if r= -1 __________________

there is a perfect negative linear relation

the closer r is to 1

the stronger the evidence of a positive association

the closer r is to -1

the stronger the evidence of a negative association

if r is close to 0

there is no linear relation

true of false; r has no units

true!!

Is r resistant to outliers?

NO R IS NOT RESISTANT TO OUTLIERS

which linear relation is this?

no linear relation

which linear relation is this?

strong negative linear relation

which linear relation is this?

moderate negative linear relation

which linear relation is this?

moderate positive linear relation

which linear relation is this?

strong positive linear relation

which linear relation is this?

perfect positive linear relation

which linear relation is this?

perfect negative linear relation