Daily Practice

Foundation

25th November 2024

5 questions · Foundation tier · 282 questions in this band

1
Stratified Sampling (Foundation)
A researcher wants a stratified sample of 30 from a population of 300 split into three regions: North (90 people), South (150 people) and East (60 people). She actually samples 9 from the North, 14 from the South and 7 from the East. Show whether her sample is correctly stratified, stating the correct numbers if not.
2
Pilot Surveys (Foundation)
What is a pilot survey?
3
Recognising Misleading Graphs (Foundation)
A newspaper bar chart showing company profit over 5 years has no vertical axis labels or scale, just bars of different heights. Explain the problem with this.
4
Mean Median Mode and Range
Find the mean of 4, 7, 9, 12, 18.
5
The Statistical Enquiry Cycle
Name the first stage of the statistical enquiry cycle.

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