18. Statistics
iGCSE (2021 Edition)
18.08 Grouped data graphs
Interactive practice questions
Find the class centre for the class interval $17$17-$22$22.
Easy
< 1min
If the range (difference between the highest and lowest scores) of a set of continuous data is $20$20, what is the size of each class interval if we group the data into:
Easy
2min
The frequency table below shows the resting heart rate of some people taking part in a study.
Easy
2min
As part of a fuel watch initiative, the price of petrol, $p$p, at a service station was recorded each day for $21$21 days. The frequency table shows the findings.
Easy
< 1min
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