JAMB and WAEC Mathematics questions: Statistics

53 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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2. Question 2· Statistics· WAEC

   Find the median of 3, 9, 4, 7, 11 and 5.

   • A7
   • B5
   • C6
   • D6.5

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3. Question 3· Statistics· WAEC

   Find the variance of 2, 4, 6.

   • A2
   • B4
   • C8/3
   • D√(8/3)

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4. Question 4· Statistics· JAMB

   A cumulative frequency curve is called

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

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5. Question 5· 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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6. Question 6· Statistics· WAEC

   Find the range of the numbers 15, 9, 23, 11, 18.

   • A23
   • B9
   • C14
   • D8

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7. Question 7· Statistics· JAMB

   Find the variance of 2, 4 and 6.

   • A2
   • B4
   • C8/3
   • D16/3

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8. Question 8· Statistics· JAMB

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

   • A4
   • B7
   • C3
   • D5

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9. Question 9· Statistics· WAEC

   Find the mean of 3, 7, 8, 10 and 12.

   • A7
   • B8
   • C10
   • D9

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10. Question 10· Statistics· JAMB

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

    • A16
    • B19
    • C9
    • D12

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11. Question 11· Statistics· WAEC

    Find the range of 23, 41, 17, 35 and 29.

    • A24
    • B41
    • C17
    • D18

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12. Question 12· Statistics· WAEC

    In a pie chart showing 72 students, what angle represents a group of 18 students?

    • A18°
    • B72°
    • C90°
    • D45°

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13. Question 13· Statistics· WAEC

    Calculate the variance of 1, 3, 5 and 7.

    • A√5
    • B20
    • C4
    • D5

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14. Question 14· Statistics· WAEC

    Find the mode of the scores 2, 4, 4, 5, 6, 4, 7, 5.

    • A7
    • B5
    • C2
    • D4

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15. Question 15· Statistics· WAEC

    The scores 1, 2 and 3 occur with frequencies 2, 3 and 5 respectively. Find the mean score.

    • A3
    • B2
    • C7.7
    • D2.3

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16. Question 16· Statistics· WAEC

    Find the range of 15, 8, 22, 11, 30.

    • A8
    • B30
    • C15
    • D22

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17. Question 17· 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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18. Question 18· Statistics· JAMB

    Find the mean deviation of 2, 4 and 6.

    • A4/3
    • B2
    • C8/3
    • D0

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19. Question 19· Statistics· JAMB

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

    • A2
    • B5
    • C√5
    • D√20

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20. Question 20· 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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