Grade 7 · Math · Unit 14 of 16
Mean, Median & Mode
What is typical?
What your child practises
Mean, median, mode and range, and how an outlier changes them.
Nunavut Curriculum approved guide: Alberta Mathematics K–9 (2007), Statistics and Probability · mean, median, mode and range, and the effect of outliers
How we explain it
Children can open this short lesson before they practise.
- Mean: add the values and divide by how many there are.
- Median: the middle value when the data is in order. Mode: the most common value.
- An outlier is a value far from the rest. It pulls the mean most.
Example: Find the median of 3, 9, 5, 7, 4. Put in order: 3, 4, 5, 7, 9. The middle value is 5. Answer: 5
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
What is the range of 52, 9, 8, 42, 43?
- 49
- 44
- 39
44
Hint: The range is the greatest value minus the least value.
Question 2
What is the mode of 5, 16, 10, 11, 2, 5?
- 7
- 2
- 5
5
Hint: The mode is the value that appears most often.
Question 3
What is the mean of 8, 5, 4, 15?
- 9
- 8
- 10
8
Hint: Add all the numbers (32), then divide by how many there are (4).
Question 4
What is the mean of 15, 7, 4, 20, 14?
- 10
- 12
- 13
12
Hint: Add all the numbers (60), then divide by how many there are (5).
Question 5
Which value is an outlier in 13, 114, 15, 19, 10, 14?
- 114
- 14
- 13
- 10
114
Hint: An outlier is far away from the other values in the data set.
Question 6
What is the median of 4, 20, 11, 4, 10?
- 14
- 0
- 10
10
Hint: Put the numbers in order. The median is the middle one.