Representing Relationships Between Two Quantitative Variables
AP Statistics · Flashcards
AP STATISTICS · FLASHCARDS
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QUESTION
Determine the slope
b
b
b
given
r
=
0.5
r = 0.5
r
=
0.5
,
s
y
=
2
s_y = 2
s
y
=
2
,
s
x
=
4
s_x = 4
s
x
=
4
.
QUESTION
Identify the correlation strength:
r
=
−
0.9
r = -0.9
r
=
−
0.9
.
QUESTION
What is the purpose of transformation in regression?
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ANSWER
Stabilize variance and make data normal. Improves model fit by meeting assumptions.
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