Grade 8 · Statistics & Probability
Data & graphs
270 problems in this skill, each with a solver-verified answer key. Answers are checked the moment you submit — with a hint if you want one and a worked solution afterwards.
What the problems look like
A few statements from this skill. Answers, hints and worked solutions live in the practice session.
Warm-up
A class of 10 students scored the following on a quiz: 78, 82, 85, 90, 75, 88, 92, 80, 84, 77. What is the mean score?
Warm-up
The heights (in cm) of 6 students are: 140, 155, 150, 160, 145, 158. What is the range of these heights?
Warm-up
If 3/5 of the students in a class of 25 are girls, how many girls are there?
Problems shown under their original terms: Generated (solver-verified).
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