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Statistics for Everyday Life

Understanding Data quiz

12 questions on Understanding Data, graded instantly with an explanation for every answer. Free and no sign-up — your best score is saved on this device. Want to study first? Read the Understanding Data lessons.

Understanding Data — Module Assessment

12 questions · pass mark 75%

  1. 1.What makes statistics necessary?
  2. 2.Which is a descriptive rather than inferential statement?
  3. 3.Why can you not average department codes (Marketing = 1, Sales = 2)?
  4. 4.What assumption does averaging a 1–5 satisfaction scale make?
  5. 5.What distinguishes a histogram from a bar chart?
  6. 6.A dataset has mean £50,000 and median £27,500. What does the gap indicate?
  7. 7.When is the mean the better summary despite skew?
  8. 8.Two delivery routes both average 30 minutes. Why might they not be equivalent?
  9. 9.What is regression to the mean?
  10. 10.After five heads in a row, what is the chance the next flip is tails?
  11. 11.A test is 99% accurate for a condition affecting 1 in 1,000. A positive result means roughly:
  12. 12.In plain language, explain why the mean and median can tell different stories about the same incomes.
Answer every question to submit.