# Statistical Investigator SSC CGL TIER 2 Paper 3 : Part – 5

# Statistical Investigator SSC CGL TIER 2 Paper 3 : Part – 5

**Statistical Investigator** SSC CGL TIER 2 Paper 3 : Part – 5

**Q61**.** In given distribution **** **** The coefficient of variation is**

(a) 72%

(b) 68%

(c) 48%

(d) 15%

**Q62**. **The coefficient of variance of a data is 25% and the mean is 20. Then standard deviation of the data set is**

(a) 1.25

(b) 4.00

(c) 5.00

(d) 6.25

**Q63.** **The variance of the data 5,11,13,19,20 is 37.5, the variance 7,13,15,21,22 is equal to**

(a) 37.5

(b) 32.2

(c) 34.2

(d) 39.5

**Q64**.** The variance of the data under consideration is 7. If each of the data points is multiplied by 3, then the variance of the new data is**

(a) 7

(b) 10

(c) 21

(d) 63

**Q65**. **The relation btw coefficient of variation C.V. and coefficient of dispersion based on standard deviations is**

**Q66**.

**The mean of two samples of sizes 50 and 100 respectively are 54.1 and 50.3 and the standard deviations are 8 and 7. Then the mean and standard deviation of the sample of size 150 containing the two samples is**

(a) 52.57 and 8.56

(b) 51.57 and 7.56

(c) 54.57 and 8.96

(d) 53.57 and 8.76

**Q67**. **The type of error that will creep into the calculation of moments for continuous frequency distribution is**

(a) Grouping error

(b) Standard error

(c) Non- sampling error

(d) Non- grouping error

**Q68**. **If mean is 25 and standard deviation is 5 then C.V – coefficient of variation is**

(a) 25%

(b) 20%

(c) None of these

(d) 100%

**Q69**. **The mean of a distribution is 14 and the standard deviation is 5. What is the value of the coefficient of variation?**

(a) 60.4%

(b) 48.3%

(c) 35.7%

(d) 27.8%

**Q70**. **The mean of a distribution is 23, the median is 24, and the mode is 25.5. it is most likely that this distribution is **

(a) Positively skewed

(b) Symmetrical

(c) Asymptotic

(d) Negatively skewed

**Q71**. **If the standard deviation of a population is 9, the population variance is**

(a) 9

(b) 3

(c) 2

(d) 81

**Q72****. Given X _{1 }= 12, X_{2 }= 19, X_{3 }= 10, X_{4 }= 7, then ∑^{4}_{i = 1 }^{ }equals^{ }**

**?**

(a) 36

(b) 48

(c) 41

(d) 29

**Q73****. If a distribution is abnormally tall and peaked, then is can be said that the distribution is:**

(a) Leptokurtic

(b) Pyrokurtic

(c) Platykartic

(d) Mesokurtic

**Q74**.** Kurtosis of a set observations on temperature of Kolkata measured in degree Celsius is 3, 2. If the temperature are measured in degree Fahrenheit, the value of the kurtosis**

(a) Will be changed

(b) Remains unchanged

(c) Will increase

(d) Will decrease

**Q75**

**. The magnitude of correlation coefficient is the …….. of two regression coefficients.**

(a) HM

(b) Angle

(c) AM

(d) GM

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