AP Bio - Unit 0: Scientific Processes

what is science

the study of natural phenomena

scientific process

observation, scientific question, hypothesis, prediction, experiment, conclusion

types of controls

negative, positive and baseline

negative control

placebo. given “treatment” that doesnt actually have effect

positive control

a different treatment that has the same effect as the tested treatment

baseline control

tested group doesnt receive treatment for a short time

Alternative hypothesis vs null hypothesis

Ha - a differnce between variables is anticipated

H0 - there will be no difference between observed and expected data

Chi Squared Equation

χ^2= ∑((O-E)^2/E)

O = observed data

E = expected data

if result in less than or equal to the p-value, accept the null hypothesis