Statistic Jamb Mathematics Past Questions

Question 6

scores	1	2	3	4	5	6
No. of students	1	4	5	6	x	2

The table above shows that the scores of a group of students in a test. If the average score is 3.5, find the value of x

jamb 2005

• A. 1
• B. 2
• C. 3
• D. 4

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Question 7

The model height and range of heights 1.35, 1.25, 1.35, 1.40, 1.35, 1.50, 1.35, 1.50, and 1.20 are m and r respectively. Find m+2r.

jamb 2005

• A. 1.35
• B. 1.65
• C. 1.95
• D. 3.00

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Question 8

Find the value of t if the standard deviation of 2t, 3t, 4t, 5t, and 6t is √2

jamb 2005

• A. 1
• B. 2
• C. 3
• D. 4

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Question 9

score	1	2	3	4	5	6	7	8
frequency	2	3	5	12	10	6	4	1

The table above shows the scores of a group of students in a physics test. If the mode is m and the number of students who scored 4 or more is n, what is (n, m)?

jamb 2006

• A. (33, 4)
• B. (22, 4)
• C. (33, 12)
• D. (12, 4)

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Question 10

If the mean of five consecutive integers is 30, find the largest of the numbers

jamb 2006

• A. 28
• B. 30
• C. 32
• D. 34

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