BIOL 3863 Lecture Notes - Lecture 3: Null Hypothesis, Natural Selection, Heritability
Document Summary
Statistics an objective, mathematical way of attaching a level of confidence to a conclusion p-value value between 0 and 1 that measures the probability that we are making a false conclusion (ex. Lower p values increase probability of rejecting null hypothesis) Alpha value predetermined level of confidence that is needed to reject null hypothesis: if p is less that alpha, we reject null hypothesis. Nothing is necessarily proven if null hypothesis is rejected. If null hypothesis is not rejected, either : there isn"t really any effect/difference between samples, or the effect is weak and more data is needed. Evolution and ecology: evolution, driven by interactions between organisms, and between organisms and the environment, ecologies of organisms are a result of their evolutionary history, darwin"s conclusions, evolution by natural selection, descent by modification/change in trait frequency, ex. Ecological interactions drive evolution: and vice versa.