Скачать с ютуб Hypothesis Testing | Population Mean: σ Unknown | Upper Tail Test в хорошем качестве

Hypothesis Testing | Population Mean: σ Unknown | Upper Tail Test

Statistics Calculators: https://www.statssolver.com/ In the sigma unknown case, the t distribution is used instead of the z distribution. The test statistic is thus written as t instead of z. The formulas for the test statistic are the same except that the sample standard deviation is used in place of the population standard deviation. The degrees of freedom for the test statistic is the sample size minus one. For an upper tail test, the p-value is the probability of getting a value for the test statistic as large as or larger than that provided by the sample. The critical value is the value of the test statistic corresponding to an area of alpha in the upper tail of the sampling distribution of the test statistic.