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Quiz Chapter 12: Measures of Central Tendency

10 questions ยท Form 2 Mathematics Bab 12: Measures of Central Tendency

Question 1 of 10Score: 0

Find the mode of the data set: 2, 5, 8, 2, 5, 9, 10.

Full Question List & Answer Key

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1. Find the mode of the data set: 2, 5, 8, 2, 5, 9, 10.

  1. 2 and 5
  2. 5 only
  3. 2 only
  4. No mode
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Answer: A

Both 2 and 5 appear twice with the highest frequency, making this data set bimodal.

2. What is the mode of the following set of numbers: 4, 7, 3, 7, 8, 5, 7, 9?

  1. 7
  2. 6
  3. 5
  4. 8
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Answer: A

The number 7 appears most frequently (3 times), so the mode is 7.

3. What happens to the mean of a data set if every number in the set is multiplied by 3?

  1. The mean is multiplied by 3
  2. The mean increases by 3
  3. The mean remains unchanged
  4. The mean is divided by 3
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Answer: A

Multiplying all values by a constant scale factor k scales the mean by the same factor k.

4. Five numbers have a median of 14. If the data set in ascending order is 8, 10, m, 18, 21, what is m?

  1. 14
  2. 12
  3. 16
  4. 10
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Answer: A

In an ordered 5-item set, the median is the 3rd term (m). Thus, m = 14.

5. Find the median of the even set of numbers: 4, 10, 8, 14, 6, 12.

  1. 9
  2. 8
  3. 10
  4. 8.5
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Answer: A

Arrange in ascending order: 4, 6, 8, 10, 12, 14. Middle two numbers are 8 and 10. Median = 8 + 102 = 9.

6. If the numbers 3, 6, 8, x, 12 have a mean of 8, find the value of x.

  1. 11
  2. 9
  3. 10
  4. 12
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Answer: A

Sum = 3 + 6 + 8 + x + 12 = 29 + x. Total numbers = 5. Mean = 29 + x5 = 8 => 29 + x = 40 => x = 11.

7. The mean score of 4 students in a test is 15. What is the total score of all 4 students?

  1. 60
  2. 45
  3. 30
  4. 50
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Answer: A

Sum of data = Mean * N = 15 * 4 = 60.

8. Find the median position formula for a data set of N = 25 items.

  1. 13th position
  2. 12th position
  3. 12.5th position
  4. 14th position
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Answer: A

For odd N = 25, median position = 25 + 12 = 13th position.

9. Calculate the mean of the numbers: 8, 12, 15, 10, 5.

  1. 10
  2. 12
  3. 9.5
  4. 11
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Answer: A

Sum = 8 + 12 + 15 + 10 + 5 = 50. Total count N = 5. Mean = 505 = 10.

10. A set of data consists of: 11, 13, 15, 17, 19. What is the mean?

  1. 15
  2. 14
  3. 16
  4. 13
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Answer: A

Sum = 75, Count = 5. Mean = 755 = 15.

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