Quiz8-2016FS-Key.pdf

# Quiz8-2016FS-Key.pdf - Quiz 9 Name It is difficult to...

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Unformatted text preview: Quiz 9 Name It is difficult to determine a person’s body fat percentage accurately without immersing him or her in water. Researchers hoping to find ways to make a good estimate immersed 4 male subjects, then measured their waists. X- W ' t (' 175 181 200 159 1) Compute the correlation coefﬁcient r between the body fat and waist (Hint: M1225 /3) 7:057}. in :1444. Y:iz,. 73:71}; _ §» 295 . , r‘ 3% t ‘-————‘{ w fulﬁl} ‘3 M41045 2) Based on the calculated r in part 1), comment the association between the body fat and waist. a 1 i mall/emit 1% [rm iii/f i1 MM” 3) Calculate the least square regression line equation for the prediction. €31 VJ“ :oéjizgjlﬁ : Ola; 04 ~ \1 ~§ N : {2-04%1426178‘752 \$4175 A 3+? 01 : ~34.7}+o,21’/4W 4) Conduct a hypothesis t to see whether the linear association is signiﬁcantly positive with signiﬁcance level 0.05. Please state the hypotheses, compute the p value and make the conclusion. ...
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