Statistics & Probability

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Q. If the mean of a data set is 12 and there are 8 values, what is the total sum of the values?
  • A. 80
  • B. 90
  • C. 100
  • D. 110
Q. If the mean of a data set is 20 and the standard deviation is 4, what is the coefficient of variation?
  • A. 20%
  • B. 25%
  • C. 15%
  • D. 10%
Q. If the mean of a data set is 30 and there are 10 values, what is the total sum of the values?
  • A. 300
  • B. 310
  • C. 320
  • D. 330
Q. If the mean of a data set is 50 and the standard deviation is 10, what is the coefficient of variation?
  • A. 20%
  • B. 10%
  • C. 15%
  • D. 25%
Q. If the mean of a data set is 50 and there are 10 values, what is the total sum of the values?
  • A. 500
  • B. 600
  • C. 700
  • D. 800
Q. If the median of the data set 3, 5, 7, 9, x is 7, what is the value of x?
  • A. 5
  • B. 6
  • C. 7
  • D. 8
Q. If the median of the data set {1, 2, 3, 4, 5, 6, 7, 8} is x, what is the value of x?
  • A. 4
  • B. 4.5
  • C. 5
  • D. 6
Q. If the median of the data set {3, 1, 4, 2, 5} is x, what is the value of x?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If the mode of a data set is 5, which of the following statements is true?
  • A. 5 occurs most frequently
  • B. 5 is the average
  • C. 5 is the middle value
  • D. 5 is the least value
Q. If the mode of the data set 1, 2, 2, 3, 4, 4, 4, 5 is removed, what will be the new mode?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If the mode of the data set 1, 2, 2, 3, 4, 4, 4, 5 is?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. If the mode of the data set 2, 3, 3, 5, 7, 8 is 3, what is the mode of the data set 1, 1, 2, 2, 3, 3, 3, 4?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. If the mode of the data set 2, 3, 4, 4, 5, 5, 5, 6 is removed, what is the new mode?
  • A. 4
  • B. 5
  • C. 6
  • D. No mode
Q. If the mode of the data set 2, 3, 4, 4, 5, 5, 5, 6 is?
  • A. 2
  • B. 4
  • C. 5
  • D. 6
Q. If the mode of the data set 3, 4, 4, 5, 6, 6, 6, 7 is removed, what is the new mode?
  • A. 4
  • B. 5
  • C. 6
  • D. 7
Q. If the mode of the data set 3, 7, 7, 2, 5, 7, 8 is x, what is the value of x?
  • A. 2
  • B. 3
  • C. 7
  • D. 8
Q. If the mode of the data set {1, 2, 2, 3, 4, 4, 4, 5} is removed, what is the new mode?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. If the mode of the data set {3, 5, 7, 3, 9, 3, 5} is x, what is the value of x?
  • A. 3
  • B. 5
  • C. 7
  • D. 9
Q. If the odds in favor of an event are 3:2, what is the probability of the event occurring?
  • A. 0.6
  • B. 0.4
  • C. 0.5
  • D. 0.3
Q. If the probability of an event A is 0.3, what is the probability of the event not occurring?
  • A. 0.7
  • B. 0.3
  • C. 0.5
  • D. 0.2
Q. If the probability of an event A is 0.7, what is the probability of the event not occurring?
  • A. 0.3
  • B. 0.7
  • C. 0.5
  • D. 0.1
Q. If the probability of an event is 0.7, what is the probability of its complement?
  • A. 0.3
  • B. 0.7
  • C. 1
  • D. 0.5
Q. If the probability of an event is 0.7, what is the probability of the event not occurring?
  • A. 0.3
  • B. 0.7
  • C. 0.5
  • D. 0.1
Q. If the probability of event A is 0.4 and event B is 0.5, what is the probability of both events occurring if they are independent?
  • A. 0.2
  • B. 0.4
  • C. 0.5
  • D. 0.6
Q. If the range of a data set is 15 and the minimum value is 5, what is the maximum value?
  • A. 10
  • B. 15
  • C. 20
  • D. 25
Q. If the scores of 10 students are: 50, 60, 70, 80, 90, 100, 50, 60, 70, 80, what is the mode?
  • A. 50
  • B. 60
  • C. 70
  • D. 80
Q. If the scores of 5 students are 10, 20, 30, 40, and x, and the mean is 30, what is the value of x?
  • A. 30
  • B. 40
  • C. 50
  • D. 60
Q. If the scores of 7 students are 50, 60, 70, 80, 90, 100, and 110, what is the median score?
  • A. 70
  • B. 80
  • C. 90
  • D. 100
Q. If the scores of a student are 50, 60, 70, 80, and 90, what is the mode?
  • A. 50
  • B. 60
  • C. 70
  • D. No mode
Q. If the scores of a student in five subjects are 60, 70, 80, 90, and 100, what is the median score?
  • A. 70
  • B. 80
  • C. 90
  • D. 100
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