[单选题]
The following statements relate to the calculation of the regression line y = a + bx using the information on the formulae sheet at the end of this examination paper:(i) n represents the number of pairs of data items used(ii) (Σx)2 is calculated by multiplying Σx by Σx(iii) Σxy is calculated by multiplying Σx by ΣyWhich statements are correct?
A .(i) and (ii) only
B .(i) and (iii) only
C .(ii) and (iii) only
D .(i), (ii) and (iii)
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