computing the test statistic and p-value in minitab express

A test statistic measures the degree of agreement between a sample of data and the null hypothesis. Because this p-value is less than α, you declare statistical significance and reject the null hypothesis.ĭifferent hypothesis tests use different test statistics based on the probability model assumed in the null hypothesis. The test statistic is used to calculate the p-value. This Z-value corresponds to a p-value of 0.0124. State whether this p-value would indicate reject the null hypothesis or fail. Suppose you perform a two-tailed Z-test with an α of 0.05, and obtain a Z-statistic (also called a Z-value) based on your data of 2.5. To use MINITAB to conduct a hypothesis test for a population proportion. A p value of 0.05 is frequently used during statistical hypothesis testing. This causes the test's p-value to become small enough to reject the null hypothesis.įor example, the test statistic for a Z-test is the Z-statistic, which has the standard normal distribution under the null hypothesis. Anybody performing a statistical hypothesis test must understand what p values mean in regards to their statistical results as well as potential limitations of statistical hypothesis testing. When the data show strong evidence against the assumptions in the null hypothesis, the magnitude of the test statistic becomes too large or too small depending on the alternative hypothesis.

The sampling distribution of the test statistic under the null hypothesis is called the null distribution. A test statistic contains information about the data that is relevant for deciding whether to reject the null hypothesis. Its observed value changes randomly from one random sample to a different sample. There is evidence that there is a relationship between the volume of a tree and its height. The test statistic is used to calculate the p-value.Ī test statistic measures the degree of agreement between a sample of data and the null hypothesis. statistic parameter b test statistic std devof statistic SE P- 0 This is the p-value of a Linear Regression t test. The test statistic compares your data with what is expected under the null hypothesis. You can use test statistics to determine whether to reject the null hypothesis. A test statistic is a random variable that is calculated from sample data and used in a hypothesis test.

Computing the test statistic and p-value in minitab express