Test
Pie charts and samples
Dynamic tasks on sectors, percentages and data represented by pie charts. The test also checks understanding of representative samples and sampling methods.
Time left: 00:00:00
Sample questions
- A category represents ___% of a pie chart. What is the angle of its sector?
- A sector of a pie chart has angle ___°. What percentage of all data does it represent?
- A survey included ___ students. In the pie chart, ___% chose answer A. How many students chose A?
- Out of ___ respondents, ___ chose answer B. What percentage is this?
- Which category has the largest share in the pie chart?___
Pie charts and samples
A complete pie chart represents 360° and 100%. Find a sector angle by multiplying the percentage by 360°/100; find a percentage by dividing the sector angle by 360° and multiplying by 100.
Reliable samples
A sample should represent the complete population. A convenient, very small or single-group sample may be biased. Percentages of all sectors in a pie chart must total 100%.
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