Daily Practice

Foundation

17th August 2025

5 questions · Foundation tier · 282 questions in this band

1
Collecting Data
Give one advantage of using a questionnaire to collect data.
2
Comparing Data Sets
Two classes sit the same test. Class P: mean 70, range 10. Class Q: mean 55, range 30. Write a full comparison.
3
Combined Mean
Group A has 4 items with mean 12. Group B has 4 items with mean 20. Find the combined mean.
4
Designing Questionnaires and Surveys
What is wrong with the question 'How old are you and do you smoke?'
5
Experimental Design
In a medicine trial, half the patients receive the real drug and half receive a dummy pill, and neither the patients nor the doctors know who received which until after results are recorded. What is this type of trial called, and why is it used?

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