1
vote
0answers
31 views

Randomized experimental design in genetic experimentation.

I am struggling to find out if randomization is used in traditional genetic breeding experimentation with model organisms, especially in lab contexts? And why this should be so? This is part of a ...
3
votes
0answers
653 views

What are the factors to consider when determining the sample size for a given study?

Say I'm designing a retrospective study (where I'd collect data from various schools for the last 5 years) to see if consuming milk can contribute to childhood obesity. How do I decide on how many ...
20
votes
3answers
1k views

Is it necessary to conduct a power analysis before beginning an experiment?

I know that power analysis is the statistically valid way to ensure you use the correct numer of samples or repeats in an experiment. But I have never seen any biologist actually conduct a power ...