Daily Practice
Foundation
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12th March 2026
- 1Comparing Data Sets
The mean rainfall in April was 45 mm with a range of 20 mm; in May it was 45 mm with a range of 8 mm. Compare April and May.
- 2Combined Mean
Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.
- 3Designing Questionnaires and Surveys
Give one reason why the response options '0-5, 5-10, 10-15' are a poor choice for hours of homework.
- 4Experimental Design
What is meant by the independent variable in an experiment?
- 5Median Quartiles and IQR
For the ordered data 6, 9, 11, 14, 16, 18, 20, 23, 25, 28, find the interquartile range.
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