.o Model of relationship between Y and X Y= f(X)+e Total Variation in Y= Explained Variation +Unexplained variation Two issues e Can a model of the link be made? Can The Total Variation in Y, Explained Variation and the Unexplained variation be measured? For Graph 1 and Graph 5 今Y=a+bX ≈a- intercept b-gradient/slope For Graphs 2, 3&4 ◆ Statistical model❖ Model of relationship between Y and X －Y= f(X) + e －Total Variation in Y = Explained Variation +Unexplained Variation －Two issues ❖ Can a model of the link be made? ❖ Can 'The Total Variation in Y', 'Explained Variation' and the 'Unexplained Variation' be measured? －For Graph 1 and Graph 5 ❖ Y= a + bX a – intercept b – gradient/slope －For Graphs 2,3 & 4 ❖ Statistical model