Guided, difficulty 1 of 3
Mean of a small sample
A café recorded how many customers arrived in each of eight half-hour periods:
21, 15, 23, 48, 21, 33, 41, 18
What is the mean number of customers per period? Give your answer to 2 decimal places.
Practice
Practise until it sticks
Choose a topic, a skill or a difficulty. Calculation exercises have new versions with fresh numbers once you have solved them, so you can practise the method rather than memorise an answer.
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