Hypothesis Testing | Population Mean: σ Known | Lower Tail Test
Автор: Stats Solver
Загружено: 2022-10-22
Просмотров: 1713
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When doing hypothesis tests about the population mean, the steps taken depend on the form of the hypothesis test. However, the first step is always to compute the value of the test statistic. The test statistic can then be used with either the p-value approach or critical value approach. In the p-value approach, we compute a p-value, where "p" stands for probability. In a lower tail test, the p-value is the probability of getting a value for the test statistic as small as or smaller than that provided by the sample. In a lower tail test, the critical value is the value of the test statistic corresponding to an area of alpha in the lower tail of the sampling distribution of the test statistic.
0:00 - Introduction
2:15 - Test Statistic
4:10 - p-Value Approach
8:30 - Critical Value Approach
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