Concepts Review

4.11. Concepts Review#

Here we review some conceptual points from the lecture.

Please try to answer each question yourself before clicking to reveal the answer

You can discuss these points with your tutor at the computer-based tutorial session (these sessions are for discussing concepts as well as for developing Python skills)

  1. What are type 1 and type 2 errors
  2. How is statistical power defined?
  3. How does the probability of Type 1 error depend on sample size?
  4. How does the probability of Type 2 error depend on sample size?
  5. The power of a test depends on three variables, what are they?
  6. How is effect size defined for a correlation, and for a t-test
  7. How does effect size depend on sample size?
  8. Power of 80% is generally considered desirable. How does the sample size required to achieve 80% power depend on the effect size?