Computer Oriented Statistical Techniques MCQs - 3 | 100+ MCQ Questions with Answers

51) _______ of the cases are included between Mean ± Standarad Deviation.

a) 90%
b) 80%
c) 74.27%
d) 68.27%

Ans: d

52) If the absolute dispersion is the standard deviation s and if the average is the mean X, then the relative dispersion is called the ____________________

a) coefficient of variation
b) coefficient of Standarad Deviation
c) coefficient of Mean Deviation
d) coefficient of Median

Ans: a

53)

Ans: a

54)

Ans: c

55)

Ans: b

56)

Ans: a

57)

Ans: b

58)

Ans: c

59)

Ans: d

60)

Ans: a

61) The second moments of the set 2, 3, 7, 8, 10.

a) 36.4
b) 45.2
c) 40.8
d) 47.8

Ans: b

62) the fourth moments for the set 4, 7, 5, 9, 8, 3, 6

a) 1876
b) 2495
c) 2188
d) 3396

Ans: c

63)

a) 16.7
b) 15.4
c) 18.2
d) 17.6

Ans: d

64) A fair die is tossed twice. Find the probability of getting a 4, 5, or 6 on the first toss and a 1, 2, 3, or 4 on the second toss

a) 1/3
b) 1/5
c) 1/7
d) 2/5

Ans: a

65) Two cards are drawn from a well-shuffled ordinary deck of 52 cards. Find the probability that they are both aces if the first card is replaced.

a) 2/169
b) 1/169
c) 4/169
d) 8/169

Ans: b

66) Three balls are drawn successively from the box of containing 6 red balls, 4 white balls, and 5 blue balls. Find the probability that they are drawn in the order red, white, and blue if each ball is not replaced.

a) 3/91
b) 2/91
c) 4/91
d) 1/13

Ans: c

67) Find the probability of a 4 turning up at least once in two tosses of a fair die

a) 1/9
b) 5/18
c) 8/18
d) 11/36

Ans: d

68) In how many ways can 10 people be seated on a bench if only 4 seats are available?

a) 5040
b) 210
c) 151200
d) 1050

Ans: a

69) In how many ways can 5 differently coloured marbles be arranged in a row?

a) 60
b) 120
c) 720
d) 840

Ans: b

70) It is required to seat 5 men and 4 women in a row so that the women occupy the even places. How many such arrangements are possible?

a) 5040
b) 120
c) 2880
d) 5

Ans: c

71) If a man purchases a raffle ticket, he can win a first prize of $5000 or a second prize of $2000 with probabilities 0.001 and 0.003. What should be a fair price to pay for the ticket?

a) 8
b) 14
c) 9
d) 11

Ans: d

72) In a given business venture a lady can make a profit of $300 with probability 0.6 or take a loss of $100 with probability 0.4. Determine her expectation.

a) 140
b) 150
c) 200
d) 86

Ans: a

73)

a) 8
b) 16
c) 18
d) 22

Ans: b

74)

Ans: c

75) A purse contains 2 silver coins and 4 copper coins, and a second purse contains 4 silver coins and 3 copper coins. If a coin is selected at random from one of the two purses, what is the probability that it is a silver coin?