PSCH 343 Study Guide - Midterm Guide: Fiza, Null Hypothesis, Statistical Hypothesis Testing
Document Summary
Null hypothesis: there is no relationship between the two variables stated in the hypothesis. (research fails to prove the hypothesis) Alternative hypothesis: there is a relationship between the two variables presented (iv affects dv) Case i research: uses one sample to test a hypothesis about the value of the population, with high and low scores. Case ii research: uses two samples to test a hypothesis about the differences between the two population means, control group and sample group: hypothesis testing asks about populations not samples. Beyond case ii research: more than two samples are used to and the differences among the population means that are observed. Correlation research: does not attempt to exert an influence on a measured response. Because variables are not controlled, this research cannot identify causal relations among variables: aimed at identifying the variables that occur together, how much pr the amount that affects or influence.
