Correlation coefficient:
a) a sysyematic relationship between x and y - A (can always tell)
b) the relationship between x and y is linear or curved - N(can never tell)
we can tell if relationship is linear or curved from graph
c) the least squares line has a positive or negative slope - A(can always tell)
if slope is positive then correlation coefficient is positive
d) how closely the points fall near a line - N(can never tell)
e) there are outliers or influential points -S(can sometimes tell)
if there are extreme observations correlation coefficient is significantly affected
f) how steep the least squares line is - N(can never tell)
we can tell this from the graph
Correlation coefficient: a) a sysyematic relationship between x and y - A (can always tell) b) the
1. Correlationcoefficient:
a) a sysyematic relationship betweenxand y- A(canalways tell)
b) the relationship betweenxand yis linear or curved - N(cannever tell)
we cantellifrelationship is linear or curved fromgraph
c) the least squares line has a positive or negative slope - A(canalways tell)
ifslope is positive thencorrelationcoefficient is positive
d) howcloselythe points fallnear a line - N(cannever tell)
e) there are outliers or influentialpoints -S(cansometimes tell)
ifthere are extreme observations correlationcoefficient is significantlyaffected
f) howsteep the least squares line is - N(cannever tell)
we cantellthis fromthe graph
