SOCIOL 3H06 Chapter Notes - Chapter 7: Effect Size, Standard Deviation, Null Hypothesis
27 Dec 2014
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Null hypothesis: the hypothesis of equal population means. Any observed difference between samples is seen as a chance occurrence resulting from sampling error. Research hypothesis: the hypothesis that regards any observed difference between samples as reflecting a true population difference and not just sampling error. Sampling distribution of differences between means: a frequency distribution of a large number of differences between random sample means that have been drawn from a given population. Level of significance: a level of probability at which the null hypothesis can be rejected and the research hypothesis can be accepted. 05 level of significance: a level of probability at which the null hypothesis is rejected if an obtained sample difference occurs by chance only 5 times or less out of 100. Type i error: the error of rejecting the null hypothesis when it is true. Type ii error: the error of accepting the null hypothesis when it is false.
