1. The difference between the lowest and the highest values present in a sample is known as**
(i) Arithmetic mean
(ii) Standard error
(iii) Coefficient of variation
(iv) Range
2. The sum of all the observations in a sample divided by their number relates to**
(i) Arithmetic mean
(ii) Standard error
(iii) Coefficient of variation
(iv) Range
3. The square root of variance is called as**
(i) Standard deviation
(ii) Standard error
(iii) Coefficient of variation
(iv) Range
4. Choose the correct one**
(i) The sum of squares of the deviations of all observations of a sample from the sample mean divided by the degrees of freedom N-1, (where, N = number of observations) refers to variance
(ii) Coefficient of variation is estimated by dividing the estimate of standard deviation by the square root of the number of observations in the sample
(iii) The square of standard deviation is known as variance
(iv) Both (i) and (iii)
5. The percentage ratio of standard deviation of a sample to the sample mean is known as**
(i) Standard deviation
(ii) Standard error
(iii) Coefficient of variation
(iv) Variance
6. Choose the correct one**
(i) CV = (SD / 𝑋̄) × 100
(ii) SE = SD / √N
(iii) S² = \[Σx² – (Σx)² / N] / (N – 1)
(iv) All of these
7. Phenotypic coefficient of variation (PCV) is calculated by**
(i) √VP / 𝑋̄ × 100
(ii) VP / 𝑋̄ × 100
(iii) 𝑋̄ / √VP × 100
(iv) None of these
8. Genotypic coefficient of variation (GCV) is calculated by**
(i) √VG / 𝑋̄ × 100
(ii) 𝑋̄ / √VG × 100
(iii) √VG × 100
(iv) None of these
9. Environment coefficient of variation (ECV) is calculated by**
(i) √VE / 𝑋̄ × 100
(ii) √σ²E / 𝑋̄ × 100
(iii) σE² / 𝑋̄ × 100
(iv) All of these
10. If the value of PCV > GCV then which of the following conclusion can be drawn**
(i) Significant role of environment on expression of character and selection is ineffective.
(ii) Variation is due to both genotype and environment and selection may be misleading
(iii) Carelessness in recording data on individual plants
(iv) Both (i) and (ii)
11. If the value of GCV > PCV then which of the following conclusion can be drawn**
(i) Significant role of environment on expression of character and selection is ineffective.
(ii) Variation is due to both genotype and environment and selection may be misleading
(iii) Carelessness in recording data on individual plants
(iv) Both (i) and (ii)
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