JAMB Mathematics questions: Statistics

27 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Statistics· JAMB

   Find the range of 15, 22, 8, 31 and 19.

   • A16
   • B31
   • C23
   • D8

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   Explanation and discussion

2. Question 2· Statistics· JAMB

   A cumulative frequency curve is called

   • Aan ogive
   • Ba histogram
   • Ca bar chart
   • Da pie chart

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3. Question 3· Statistics· JAMB

   The mean of five numbers is 8. Four of them are 6, 7, 9 and 10. Find the fifth number.

   • A9
   • B6
   • C10
   • D8

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4. Question 4· Statistics· JAMB

   Find the variance of 2, 4 and 6.

   • A2
   • B4
   • C8/3
   • D16/3

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5. Question 5· Statistics· JAMB

   Find the median of 3, 8, 1, 9, 5, 7, 2.

   • A4
   • B7
   • C3
   • D5

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6. Question 6· Statistics· JAMB

   Find the range of 12, 7, 19, 3, 10.

   • A16
   • B19
   • C9
   • D12

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7. Question 7· Statistics· JAMB

   In a test, 2 students scored 1, 3 students scored 2 and 5 students scored 3. Find the mean score.

   • A2.5
   • B2
   • C3
   • D2.3

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8. Question 8· Statistics· JAMB

   Find the mean deviation of 2, 4 and 6.

   • A4/3
   • B2
   • C8/3
   • D0

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9. Question 9· Statistics· JAMB

   Find the standard deviation of 2, 4, 6 and 8.

   • A2
   • B5
   • C√5
   • D√20

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10. Question 10· Statistics· JAMB

    Find the standard deviation of 3, 5 and 7, correct to 2 decimal places.

    • A2.67
    • B1.63
    • C2.00
    • D4.00

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11. Question 11· Statistics· JAMB

    The mean of five numbers is 12. When one number is removed, the mean of the rest is 10. Find the number removed.

    • A2
    • B20
    • C12
    • D22

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12. Question 12· Statistics· JAMB

    The mean of 10 numbers is 6. When one number, 15, is removed, what is the mean of the remaining numbers?

    • A5.5
    • B4.5
    • C6
    • D5

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13. Question 13· Statistics· JAMB

    The mean of 2, 4, x, 7 and 9 is 6. Find x.

    • A30
    • B6
    • C5
    • D8

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14. Question 14· Statistics· JAMB

    Find the mean of the first five positive even numbers.

    • A6
    • B5
    • C8
    • D10

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15. Question 15· Statistics· JAMB

    In a histogram, the frequency of each class is proportional to the

    • Awidth of its bar only
    • Bheight of its bar only
    • Carea of its bar
    • Dnumber of bars

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16. Question 16· Statistics· JAMB

    Find the median of this distribution: score 1, 2, 3, 4 with frequencies 3, 5, 4, 2.

    • A3
    • B2
    • C2.5
    • D4

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17. Question 17· Statistics· JAMB

    The scores of five students are 6, 8, 8, 10 and 13. Find the mode and the range.

    • AMode 8, range 9
    • BMode 8, range 7
    • CMode 10, range 7
    • DMode 9, range 8

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18. Question 18· Statistics· JAMB

    Which measure of central tendency is most affected by extreme values?

    • Athe median
    • Bthe mean
    • Cthe mode
    • Dthe quartile

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19. Question 19· Statistics· JAMB

    Find the mode of 2, 3, 3, 4, 4, 4, 5, 5.

    • A3.75
    • B3
    • C5
    • D4

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20. Question 20· Statistics· JAMB

    Find the median of 7, 3, 9, 4, 8, 6.

    • A7.5
    • B6
    • C7
    • D6.5

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