PSY 295 Lecture Notes - Lecture 10: Null Hypothesis, Technology In Revelation Space, Standard Deviation
Document Summary
A hypothesis: a proposition made as a basis for reasoning, without any assumption of. A null hypothesis (h0): states that in the general population there is no change, no difference, or no relationship. The alternative hypothesis (h1): states that there is a change, a difference, or a relationship for the general population. Hypothesis test: a statistical procedure that uses sample data to evaluate a hypothesis about a population. 1) state a hypothesis about a population. 2) predict the expected characteristics of the sample based on the hypothesis. 3) obtain a random sample from the population. 4) compare the obtained sample data with the prediction made from the hypothesis. Alpha level ( )/significance level: a probability value used to define very unlikely outcomes. Critical region: composed of the extreme sample values that are very unlikely (as defined by the alpha value) to be obtained if the null hypothesis is true.
