STATISTICS (CDS)

Total Questions: 63

41. Suppose xᵢ = λⁱ for 0 ≤ i ≤ 10 , where λ > 1. Which one of the following is correct?

Correct Answer: (c) GM = Median
Solution:

42. Suppose xᵢ = 1/i for 1, 2, 3 ,...,11. Which one of the following is not correct?

Correct Answer: (d) Median = HM
Solution:

43. If each of n numbers xᵢ = i ( i = 1, 2, 3 ,...,n) is replaced by (i + 1)xᵢ , then the new mean is

Correct Answer: (d)
Solution:

44. The weighted arithmetic mean of first 10 natural numbers whose weights are equal to the corresponding numbers is equal to

Correct Answer: (d) 38 5.
Solution:

45. (Questions 45-48) Consider the following frequency distribution.

What is the mean of the distribution?

Correct Answer: (a) 37.2
Solution:(Questions 45-48)


46. What is the median class?

Correct Answer: (b) 30-40
Solution:


47. What is the median of the distribution?

Correct Answer: (c) 39
Solution:


48. What is the mode of the distribution?

Correct Answer: (d) 43.33
Solution:


49. There are five parties A, B, C, D and E in an election. Out of total 100000 votes cast, 36000 were cast to party A, 24000 to to party B, 18000 to party C, 7000 to party D and rest to party E. What angle will be allocated for party E in the pie-chart?

Correct Answer: (b) 54°
Solution:

50. The class which has maximum frequency is known as

Correct Answer: (c) modal class
Solution:The class which has maximum frequency is known as modal class.