Question Paper
Class / Subject: Class 9 (ICSE) · Mathematics
Chapter: Chapter 19 — Chapter 19: Mean and Median (Statistics)
Time Allowed: 32 minutes
Max Marks: 16
1. How is the mean calculated? [1]
(A) Sum of values ÷ count
(B) Only the largest value
(C) Only the smallest value
(D) Multiply all values
2. What can affect the mean significantly? [1]
(A) Extreme values (outliers)
(B) Nothing affects it
(C) Only the count of values
(D) Only the smallest value
3. What is the median? [1]
(A) The middle value in ordered data
(B) The average value
(C) The most frequent value
(D) The largest value
4. Is the median affected by outliers? [1]
(A) Less so than the mean
(B) More so than the mean
(C) Equally as the mean
(D) It cannot be calculated with outliers
5. What is the mean of 4, 6, 8? [1]
(A) 6
(B) 8
(C) 4
(D) 18
6. What is the median of 3, 5, 9? [1]
(A) 5
(B) 3
(C) 9
(D) 17
7. When might median be preferred over mean? [1]
(A) When outliers might skew the mean
(B) Never preferred
(C) Only for small datasets
(D) Only for large datasets
8. Why learn about mean and median? [1]
(A) To choose the right measure for summarising data
(B) No reason
(C) It's not useful
(D) Only for tests
9. How is the mean calculated? [1]
(A) Sum of values ÷ count
(B) Only the largest value
(C) Only the smallest value
(D) Multiply all values
10. What can affect the mean significantly? [1]
(A) Extreme values (outliers)
(B) Nothing affects it
(C) Only the count of values
(D) Only the smallest value
11. What is the median? [1]
(A) The middle value in ordered data
(B) The average value
(C) The most frequent value
(D) The largest value
12. Is the median affected by outliers? [1]
(A) Less so than the mean
(B) More so than the mean
(C) Equally as the mean
(D) It cannot be calculated with outliers
13. What is the mean of 4, 6, 8? [1]
(A) 6
(B) 8
(C) 4
(D) 18
14. What is the median of 3, 5, 9? [1]
(A) 5
(B) 3
(C) 9
(D) 17
15. When might median be preferred over mean? [1]
(A) When outliers might skew the mean
(B) Never preferred
(C) Only for small datasets
(D) Only for large datasets
16. Why learn about mean and median? [1]
(A) To choose the right measure for summarising data
(B) No reason
(C) It's not useful
(D) Only for tests