basic stats psychology
null hypothesis testing
covers z tests and inferential statistics
a. the hypothesis indicates that there is no significant difference between means or no relationship between variables. if this hypothesis is true, any difference or relationship detected in a sample is likely due to
b. the hypothesis implies that there is a relationship between variables or a difference between means. if it is a hypothesis it will predict a specific direction of the expected relationship or difference. if it is a hypothesis, it will not predict a specific direction of the difference or relationship.