Objective
Represent and interpret categorical data, grouped data and time series.
Calculator: Non-calculator core; calculator optional only for checking where labelled.

Recall
Retrieve the key fact or method needed for tables charts and time series.
Core practice
A pie chart represents 72 people. A sector angle is 135°. Find its frequency.
Reasoning
A time-series graph starts its vertical axis at 90 instead of 0. Does this make the data wrong? Explain the risk.
Exam-style
Solve an exam-style problem involving tables charts and time series. Show working, include a check and interpret your answer.