PSY202H1 Chapter 18: PSY202 - Chapter 18 (Lecture 10)
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Psy202 chapter 18: the binomial test + appendix e (lecture 10) The notation system for binomial data identifies the two categories as a and b and the probability (proportion) associated with each category as p and q respectively. The null hypothesis typically falls into one of the two categories: chance. Once p is identified, q = 1 : no change or no difference: comparing the proportions for one population to a different population, null states there is no difference between the two populations. The test statistic compares the sample data with the population data if the data are consistent with the hypothesis, we conclude that the hypothesis is reasonable, otherwise we reject it. When pn and qn are both at least 10, the binomial distribution has the following properties: the shape of the distribution is approximately normal, the mean of the distribution is , the standard deviation of the distribution is.
