One hundred dot-plot questions: ten warm-ups on reading the dots, ten each for mean, mode, range and median, then fifty mixed randomised questions. Every answer is checked from the visual display, with the working shown from the dots.
Each dot is one value. Count the data before calculating anything.
Total all dots, then divide by the number of dots.
Find the tallest stack. That x-value occurs most often.
Largest value minus smallest value.
Order the dots and find the middle, or average the two middles.
Fifty randomised questions requiring the right statistic from the same visual language.
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