Grade 7 · Math · Unit 12 of 14
Mean, Median & Mode
Typical values, spread and outliers
What your child practises
Children find the mean, median, mode and range of a data set and see how one unusual value, an outlier, changes them.
Manitoba Curriculum learning outcome: 7.SP.1, 7.SP.2 · mean, median, mode and range, and the effect of an outlier on them
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
A data set has no mode when…
- there are fewer than five values
- the mean is a whole number
- all the numbers are even
- every value appears the same number of times
Show answer
every value appears the same number of times
Hint: If no value appears more often than the others, there is no mode.
Question 2
The mean of 5 numbers is 8. What is their sum?
- 45
- 40
- 8
- 13
Show answer
40
Hint: Mean × number of values = sum, so 8 × 5.
Question 3
The range of a data set tells you…
- the average value
- the most common value
- how spread out the data are
- the middle value
Show answer
how spread out the data are
Hint: Range is the difference between the greatest and least values.
Question 4
What is the median of 2, 4, 6 and 8?
- 4
- 5
- 6
- 20
Show answer
5
Hint: With two middle numbers, 4 and 6, find the number halfway between them.
Question 5
What is the mode of 2, 3, 3, 5, 5, 8?
- 3 and 5
- 5
- 3
- 8
Show answer
3 and 5
Hint: Both 3 and 5 appear twice, more than any other value.
Question 6
Test scores are 70, 80, 90 and 80. The next score is needed to make the mean of 5 scores 82. What is it?
- 90
- 80
- 82
- 100
Show answer
90
Hint: The total must be 5 × 82 = 410. The first four add to 320, and 410 − 320 = 90.