HoMEwORK 7 STAT 226 FALL 2017 ALL SEcTIONS TIME To COMPLETE: 15 DAYS Due FrIDAY,

Question

HoMEwORK 7 STAT 226 FALL 2017 ALL SEcTIONS TIME To COMPLETE: 15 DAYS Due FrIDAY, DECEMBER 1, 5PM SUBMISSION: VIA BLACKBOARD 1. Multiple Choice. The scatterplots below display the relationship between r and y for nino different datasets. Note that the sample correlation for cach case is displayed as well Dataset A Dataset B DatasetC r = 0.67 r= 0 17 0 20 40 60 0 100 0 20 40 60 0 100 0 20 40 60 80 100 DatasetD Dataset E Dataset F 0.74 0 20 40 60 80 100 0 20 40 60 80 100 0 20 10 60 80 100 DatasetG DatasetH Dataset I -o 0.71 0 20 40 60 0 100 0 20 40 60 0 100 0 20 40 60 80 100

Explanation / Answer

For positive as x increase y increases and for negative as x increases y decreases

a. A, E& H have linear and positive

b. B, G and I have linear and negative

Values between 0 and 0.3 (0 and -0.3) indicate a weak positive (negative) linear relationship via a shaky linear rule.

Values between 0.3 and 0.7 (-0.3 and -0.7) indicate a moderate positive (negative) linear relationship via a fuzzy-firm linear rule.

Values between 0.7 and 1.0 (-0.7 and -1.0) indicate a strong positive (negative) linear relationship via a firm linear rule.

Based on this rules

c. based on this no weak and linear sets

d. A,G and I are linear and moderate

e. B,E and H are linear and strong

f. C, D and F have non linear relationship

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