Estimate p from repeated pairs of y1 and y2 and b use the

Question

Two instruments used to measure a certain phenomenon give separate responses y₁ and y₂ with variances σ²₁ and σ²₂. What aa·e two ways to determine whether these instrumental responses are correlated? Answer: (a) Estimate p from repeated pairs of y₁ and Y₂ and (b) use the sums and difference of the responses.