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Answer the following on regression and correlation.
The random variables have regression lines and . Calculate: Mean value of and . Co-efficient of…
The random variables have regression lines $3x + 2y - 26 = 0$ and $6x + y - 31 = 0$. Calculate:
(a)[2.0]
Mean value of $x$ and $y$.
(b)[2.0]
Co-efficient of correlations.
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From ISC 2025 Specimen Mathematics Paper 1, question 21(ii).
Check your working with the Regression lines calculator: both regression lines, b_yx, b_xy and r from data, summary sums or the two lines; with estimates.