Connect the ideas
Define the variable and group before collecting observations.
A frequency table must count every valid observation once.
Read the graph key, scale and units before interpreting a display.
Mean, median and mode describe different ideas of centre; range describes spread.
Compare distributions using context, centre, spread, shape and unusual observations.
Check unusual records; do not automatically delete genuine outliers.
A conclusion must match the question, group, variable and collection method.
Topic test
Complete each paper and show your working.
Statistics topic test
15 questions · 43 marks · 45 minutes · By hand