L33 Psych 300 Chapter Notes - Chapter 9: Null Hypothesis, Sampling Distribution, Statistical Hypothesis Testing
24 Feb 2019
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Chapter 09: the single-sample t test and the paired-samples t test. Identify the populations, distribution, and assumptions: then choose the appropriate hypothesis test. Calculate mean and standard error of the sampling distribution (the comparison distribution) Determine the critical values (cutoffs) that indicate the points beyond which we will reject the null hypothesis. Decide whether to reject or fail to reject the null hypothesis. Make a confidence interval (will learn this soon) T -statistic - the distance of a sample mean from a population mean in terms of the estimated standard error. We use t distributions when we do not know the population standard deviation. The two groups may be a sample and a population, or two samples as part of a and are comparing only two groups within-groups design or a between-groups design. We calculate estimated standard error by dividing by (n - 1) rather than dividing by n, when calculating standard error.
