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3. Eight students were sampled from a school with their final exam scores, Y, and hours studied, X. Assume the linear regress

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Answer #1

(1) the equation of the regression line:

y y = a + b?x= ?1.102 + 1.996?x

Y=-1.102+1.996*(-2) =-5.094

Y=-1.102+1.996*(4)=6.882

(2)the equation of the regression line:

y y = a + b?x= 66.399 + 4.905?x

Y=66.399+4.905*4 =86.019

Y=66.399+4.905*6 =95.829

(3) r=0.9856


positive correlation between X and Y

0.9856

Step 1: Find X·Y, X2 and Y as it was done in the table below. 81 49 25 45 21 32 4 4 25 4 4 4 4 21 28 49 49 16 Step 2: Find th

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