1. *Heterorhabditis sp.* Is used for the control of-

A) Rice stem bore

B) Pea leaf miner

C) White grub

D) Coriander aphid

2. *Pectinophora gossypilla* is a pest of-

A) Cumin

B) Brinjal

C) Cotton

D) Spinach

3. **In storage major pest of rice is**

A) *Cercyra Cepnolenica*

B) *Tribolium castaneum*

C)* Callosobruhus sp*

D) *Systole albipennis*

4. **The coefficient of correlation between X and Y is 0.6, their covariance is 4.8. The variance of X is 9. Then the standard deviation of Y is –**

A) 4.8/3*0.6

B) 0.6/4.8*3

C) 4.8*0.6/3

D) 4.8/9*0.6

5. **The mean of 20 observations is 25. What will be the mean of a new set of observations, if 3 is added to each observation?**

A) 26

B) 28

C) 30

D) 32

6. **Which of the following would you regard as a discrete variable**

A) Height

B) Time

C) Wages paid to workers

D) Number of children in a family

7. **If Q1 = 5, Q2 = 10 and Q3 = 20, the quartile deviation will be**

A) 15

B) 25

C) 7.5

D) 30

8. **When the value of one variable changes while another variable remains constant, it is known as**

A) Negative correlation

B) Direct correction

C) Positive correction

D) Independent

9. **The average of the absolute deviations taken from the control value is called as**

A) Mean deviation

B) Standard deviation

C) Coefficient of variation

D) Range

10. **Variance is –**

A) The square root of variation of values

B) The coefficient of variation of values

C) The reciprocal of mean of standard deviation

D) The square of the standard deviation

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Raj rajnisays:State Haryana ,district sirsa , City ellenabad,pincode 125102