Start learning →

Order the steps: compare two groups by average

Exercise and reference answers

Steps
  1. Compute the mean of each group
  2. Compare the two means to see which centres higher
  3. Compute a measure of spread for each group
  4. Check whether one group is far more scattered
  5. State the comparison with both facts, not just the averages

Explanation

An average on its own can mislead, so the spread comes into the comparison too. Source: syllabus Maths, Ch 13 Statistics.
Continue learning with Quill →

Browse more AFCAT questions and exercises →