PSY 207 Lecture Notes - Lecture 10: Null Hypothesis, Statistical Hypothesis Testing, Test Statistic
29 Jan 2019
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Ch 10: t-test for two independent samples t test for two independent samples. A single-sample t test is where one sample, or a single mean, is compared to a hypothesized population mean. Independent-measures design e. g. , one group receives treatment a, the other b. Different randomly-selected samples experience different versions of a treatment or i. v. manipulation. A dependent variable that is relevant to the manipulation is then measured. The scores on the d. v. from each sample are then compared. Because the samples consist of different people, they are considered to be independent of one another. The groups are considered samples that represent populations. Likewise, the groups of scores obtained from the samples are considered independent of one another. Through the samples, the populations are compared after treatment i. e. , the treatments do not have different effects on the scores. H0(=) claims that the populations are the same.
