MCQ on Biometrical Genetics / Quantitative Genetics Part -21 For ARS NET / SRF Exams

 

**1.** The study of relationship between one dependent variable and one independent variable by keeping the other independent variable constant is called as

(i)  Net correlation

(ii)  Partial correlation

(iii)  Both (i) and (ii)

(iv)  Multiple correlation

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**2.** When the correlation between two variables (say x₁ and x₂) is estimated by eliminating the effect of third variable (say x₃), is called as

(i)  Simple correlation

(ii)  Partial correlation

(iii)  Biserial correlation

(iv)  Multiple correlation

**3.** The order of partial correlation is

(i)  First order

(ii)  Second order

(iii)  Both (i) and (ii)

(iv)  Third order

**4.** The value of partial correlation lies between

(i)  0 to 1

(ii)  0 to -1

(iii)  -1 to 1

(iv)  None of these

**5.** Choose the incorrect statement

(i)  The value of partial correlation is always larger than multiple correlation

(ii)  The value simple correlation is always lower than multiple correlation

(iii)  The partial correlation is denoted as r₁₂.₃ or r₁₂.₃₄

(iv)  Partial correlation is estimated from simple correlation

**6.** In case of first order, the partial correlation coefficient is calculated as

(i)  r₁₂.₃ = (r₁₂ - r₁₃r₂₃) / √\[(1 - r₁₃²)(1 - r₂₃²)]

(ii)  r₁₂.₃ = (r₁₃ - r₁₂r₂₃) / √\[(1 - r₁₂²)(1 - r₂₃²)]

(iii)  r₂₃.₁ = (r₂₃ - r₂₁r₃₁) / √\[(1 - r₂₁²)(1 - r₃₁²)]

(iv)  All of these

**7.** In case of second order, the partial correlation coefficient is calculated as

(i)  r₁₂.₃₄ = (r₁₂ - r₁₃r₂₃) / √\[(1 - r₁₃²)(1 - r₂₃²)]

(ii)  r₁₂.₃₄ = (r₁₂ - r₁₃.₄r₂₃.₄) / √\[(1 - r₁₃.₄²)(1 - r₂₃.₄²)]

(iii)  r₁₂.₃₄ = (r₁₂.₃ - r₁₄.₃r₂₄.₃) / √\[(1 - r₁₄.₃²)(1 - r₂₄.₃²)]

(iv)  None of these