CRM 315 Chapter Notes - Chapter 1: Statistical Inference, Null Hypothesis, Statistical Hypothesis Testing
8 Dec 2018
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Inferential stats should provide rigorous and logically sound procedures for answering these questions. Research hypothesis: hypothesis derived from researcher"s theory about some social phenomenon are called research hypothesis, testing hypothesis means subjecting them to confirmation or disconfirmation. Null hypothesis: they serve to deny what is explicitly indicated in a given research hypothesis, ex. Regular research hypothesis: the average grade of assumption university psychology students is 90% the null hypothesis would be the average grade of. Assumption university psychology students is not 90% : whether our research hypothesis is supported or refuted, depends on the outcome of the test of the null hypothesis. Type i and type ii errors: type i errors, we use the level of significance to help us decide whether to accept or reject the null hypothesis. If we reject the null hypothesis when it is true and should not be rejected, we have committed type 1 error: type ii errors.
