Experimental design

Scientific method
1. Hypothesis: testable statement to explain set of observations
  1. observation, question, and prediction
  2. if/than statement
2. Experiment
3. Results
Theory: hypothesis that has been tested and supported so much that it is considered a fact
Experimental variables
- Independent: variable being changed
  - often environmental
  - should only be one: when that is the case, the experiment is said to be manipulative or controlled
- Dependent: things being measured and observed
  - can be multiple
- Control: things that need to remain constant to see effect of independent
  - control group rules out alternative explanations of the results, aids in precision
    - positive: guarantee positive result to show proper experiment
    - negative: guaranteed negative result to show absence of treatment
- Standard error/deviation: how precise data is
  - dependent on size of data set
- Treatment/experimental groups: group getting varying amount of IV to see response in DV

	Created by Sophia Wright almost 5 years ago

1 Plant Biology 101 Note on Unit 1: Scientific Literacy, created by Sophia Wright on 20/09/2019.