Daily Practice

Foundation

12th February 2026

5 questions · Foundation tier · 282 questions in this band

1
Combined Mean
Group A has 6 items with mean 15. Group B has 9 items with mean 25. Find the combined mean.
2
Designing Questionnaires and Surveys
Rewrite the response options '0-5, 5-10, 10-15' so that they no longer overlap.
3
Experimental Design
A scientist tests a new plant food but only uses it on the healthiest-looking plants. Explain why this is a flawed design.
4
Median Quartiles and IQR
Two classes have the same median test score. Class A has IQR = 6 and Class B has IQR = 15. Which class's scores are more consistent, and why?
5
Index Numbers
A base year value is 40 and this year's value is 50. Find the index number.

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