# 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 X1 = 12, X2 = 19, X3 = 10, X4 = 7, then ∑4i = 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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