PSY 281 Lecture Notes - Lecture 7: Sampling Distribution, Statistical Hypothesis Testing, Standard Deviation
Document Summary
Chapter 7 part 1: one-sample t-test: one-sample t-test: Used when comparing a treated sample mean to a population mean. You must know (or have an estimate) of the population mean (and you do not need to know anything about the population standard deviation: the t statistic: : is known or is a reasonable hypothesis. All that is required for a hypothesis test with t is a sample and a reasonable hypothesis about the population mean: the estimated standard error and the t statistic: The goal for a hypothesis test is to evaluate the significance of the observed discrepancy. When computing a t statistic, we cannot rely on the normal curve and sampling distribution of z. We use an alternative to the normal curve distribution called the family of t. The family of t distributions is made up of several distributions; each distribution is symmetrical and has a mean of 0.
