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MCQs

Total Questions : 155 | Page 6 of 16 pages
Question 51. _____________is used to compare the variation or dispersion in two or more sets of data even though they are measured in different units?
  1.    Range
  2.    Standard Deviation
  3.    Coefficient of Variation
  4.    Mean Deviation
 Discuss Question
Answer: Option C. -> Coefficient of Variation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 52. If all values are same then the measure of dispersion will be________________?
  1.    1
  2.    0
  3.    Mean
  4.    Mode
  5.    Median
 Discuss Question
Answer: Option B. -> 0
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 53. Standard deviation is calculated from the Harmonic Mean (HM) ________________?
  1.    Always
  2.    Sometimes
  3.    Never
  4.    None of these
 Discuss Question
Answer: Option C. -> Never
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 54. If X and Y are independent then SD (X − Y) is________________?
  1.    SD(X)−SD(Y)
  2.    SD(X)+SD(Y)
  3.    SD(X)+SD(Y)−−−−−−−−−−−−−−√
  4.    Var(X)+Var(Y)−−−−−−−−−−−−−−−√
 Discuss Question
Answer: Option B. -> SD(X)+SD(Y)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 55. If the standard deviation of the values 2, 4, 6, 8 is 2.58, then the standard deviation of the values 4, 6, 8, 10 is_______________?
  1.    0
  2.    2.58
  3.    5
  4.    4.66
  5.    2.33
 Discuss Question
Answer: Option B. -> 2.58
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 56. Variance remains unchanged by change of________________?
  1.    Origin
  2.    Scale
  3.    Both
  4.    None of these
 Discuss Question
Answer: Option A. -> Origin
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 57. Lowest value of variance can be________________?
  1.    1
  2.    -1
  3.    3
  4.    -3
  5.    0
 Discuss Question
Answer: Option E. -> 0
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 58. The sum of squared deviations of a set of n values from their mean is__________________?
  1.    Zero
  2.    Maximum
  3.    Least
  4.    None
 Discuss Question
Answer: Option C. -> Least
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 59. If a and b are two constants, then Var(a+bX) is_______________?
  1.    a±bVar(X)
  2.    Var(a)±Var(X)
  3.    ±bVar(X)
  4.    b2Var(X)
  5.    (a±b)Var(X)
 Discuss Question
Answer: Option D. -> b2Var(X)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 60. Mean Deviation, Variance and Standard Deviation of the values 4, 4, 4, 4, 4, 4 is_________________?
  1.    4
  2.    8
  3.    2
  4.    12
  5.    0
 Discuss Question
Answer: Option E. -> 0
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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