Bibliography (9):

1. ​ ‘QS’ directory

2. https://www.reddit.com/r/HPMOR/comments/2i1mb6/hpmor_progress_report_oct_2014/ckzlqk3/

3. ​ The Power of Twins: The Scottish Milk Experiment

4. https://genepi.qimr.edu.au/general/TwinPowerCalculator/

5. Wikipedia Bibliography:

   1. Variance

   2. Statistical power

   3. Observational error

   4. Effect size

   5. F-test