PSYC*2120 Study Guide - Final Guide: Null Hypothesis, Statistical Parameter, Dependent And Independent Variables
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The null hypothesis (h0) states that in the population there"s no effect of the treatment, or no difference between the means that you"re comparing. The null hypothesis (h0) predicts that the iv (treatment) will have no effect on the dv for the population. The alternative hypothesis (h1) states the opposite of the null hypothesis. The alternative hypothesis says that the treatment does have an effect on the dependent variable. There is a change, a difference, or a relationship between the iv and the dv for the population. Step 2: set the criteria for a decision. The alpha level or the level of significance. Is a probability value that is used to define the very unlikely sample outcomes if the null hypothesis is true. The alpha ( ) value is used to define low-probability outcomes. Is composed of extreme sample values that are very unlikely to be obtained if the null hypothesis is true.
