# Statistical Investigator. SSC CGL TIER 2 Paper 3, SSC CGL JSO

# Statistical Investigator. SSC CGL TIER 2 Paper 3, SSC CGL JSO

**Statistical Investigator** SSC CGL TIER 2 Paper 3 : Part – 4

**Q46**. **Which of the following diagrams would be appropriate for cumulative frequency of a discrete variable?**

(a) Step diagram

(b) Histogram

(c) Frequency curve

(d) Frequency polygon

**Q47.** **Indirect interview method for collecting primary data demands. **

(a) Creating influence of interviewee

(b) Frequently chasing the interviewee

(c) Friendly and to – the – point discussion

(d) Gossiping mood

**Q48**. **Which of the following diagrams would be appropriate corresponding to frequency table for a continuous variable?**

(a) Pie diagramme

(b) Histogram

(c) Step diagramme

(d) Ogive

**Q49**. **Pie chart is very much useful for**

(a) Assessing the contribution of different groups in a comparative way

(b) Ordering different groups

(c) Comparing different groups

(d) Measuring and evaluating different groups

**Q50**. **If ** ** m _{1} and m_{2} and **

**are average heights of two classes of 50 and 60 students, the overall average is a**

(a) Geometric mean of ** **m_{1} and m_{2}

(b) Median of m_{1} and m_{2}

(c) Simple mean of m_{1} and m_{2}

(d) Weighted mean of m_{1} and m_{2}

**Q51**.

**If the two ogives of n observations**

**x**

_{1},x_{2}**,x**

_{3}**, ……….,x**

_{n}**meet at the point (x , y), then consider the following statements :**

(a) x is the arithmetic mean of x_{1},x_{2} ,x_{3}, ……….,x_{n}

(b) x is the median of x_{1},x_{2} ,x_{3}, ……….,x_{n}

(c) y = n/2

(d) y = 1/2

**Q52**. **Suppose x has 10 values 1,2 ,…….10 with corresponding more than type cumulative frequencies F _{1}**

**, F**

_{2}**, ………. F**

_{10}**. Then the AM of this data set will be equal to**

**Q53. The number of seeds in 10 fruits of a variety are counted and the first 9 are found to be 10,9,6,11,8,9,12,10 and 7. If the number of seeds in the tenth fruit is x, then for the mean number of seeds to be at least 9,it is necessary and sufficient that**

(a) x ≥ 9

(b) x > 9

(c) x > 6

(d) x ≥ 8

**Q54. A computer supplier sells computers of some well – known brands. To improve his profits reasonably he must study the average sales of computers where th appropriate measure of average will be**

(a) Median

(b) Mode

(c) Geometric mean

(d) Arithmetic mean

**Q55. The function (x-3) ^{2 }+ (x+3)^{2} + (x-2)^{2} + (x+2)^{2} Will take its minimum value at x=**

(a) -3

(b) 0

(c) 2

(d) 3

**Q56. Which of the following is true for a symmetric distribution?**

ƍ_{3 = }Third Quartile

ƍ_{1}= First Quartile

ƍ_{2 = }Second Quartile or median

(a) (ƍ_{3 – }ƍ_{2}) = (ƍ_{2 – }ƍ_{1})

(b) (ƍ_{3 – }ƍ_{1}) = 2ƍ_{2}

(c) (ƍ_{3 – }ƍ_{2}) < (ƍ_{2 – }ƍ_{1})

(d) (ƍ_{3 – }ƍ_{2}) > (ƍ_{2 – }ƍ_{1})

**Q57. Harmonic mean is**

(a) The mean of the reciprocal of the observations

(b) The reciprocal of the mean of the observations

(c) The reciprocals of the arithmetic mean of the reciprocal of the observations

(d) None of the above

**Q58. If the median of a first set of observations is M _{1} and the median of a second set of observations is M_{2} , then the combined median M**

(a) Lies to the right of M_{2}

(b) Lies in between M_{1} and M_{2}

(c) Lies to the left of M_{1}

(d) None of the above

**Q59. Coefficient of variation is not applicable if**

i. S.D. is very large

ii. Mean is zero or negative

iii. The grouped distribution has open-end classes

iv. Extreme values are present in the data

**Which situations do you think to be justified?**

(a) i, ii and iv

(b) iii and iv

(c) ii and iii

(d) i and ii

**Q60. In a symmetric distribution the upper and the lower Quartile are not equidistant from**

(a) Harmonic mean

(b) Median

(c) Mode

(d) Arithmetic mean

Sr. No. |
Ans |

1 | A |

2 | C |

3 | B |

4 | A |

5 | D |

6 | D |

7 | D |

8 | D |

9 | B |

10 | B |

11 | A |

12 | C |

13 | B |

14 | C |

15 | A |

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