computing the test statistic and p-value in minitab express

Instead, we may state our results “provide support for” or “give evidence for” our research hypothesis (as there is still a slight probability that the results occurred by chance and the null hypothesis was correct – e.g.

You should note that you cannot accept the null hypothesis, we can only reject the null or fail to reject it.Ī statistically significant result cannot prove that a research hypothesis is correct (as this implies 100% certainty). (Round your answer to 3 decimal places.) b. This means we retain the null hypothesis and reject the alternative hypothesis. State the decision rule for 0.025 significance level: H0: 0 H1: > 0. This output provides information about the difference (i.e., the difference between carbprotein and carb), including the sample size (the 'N' column), the size for the test (the 'N for Test' column), Wilcoxon signed-rank test statistic, W (the 'Wilcoxon Statistic' column), the statistical significance (2-tailed p-value) of the Wilcoxon signed-rank test (the 'P' column) and estimated median. If the p-value is below your threshold of significance (typically p 0.05) is not statistically significant and indicates strong evidence for the null hypothesis. Therefore, we reject the null hypothesis, and accept the alternative hypothesis. It indicates strong evidence against the null hypothesis, as there is less than a 5% probability the null is correct (and the results are random). A p-value less than 0.05 (typically ≤ 0.05) is statistically significant.The smaller the p-value, the stronger the evidence that you should reject the null hypothesis. This test is performed on count data from different samples. The level of statistical significance is often expressed as a p-value between 0 and 1. How do you know if a p-value is statistically significant?Ī p-value, or probability value, is a number describing how likely it is that your data would have occurred by random chance (i.e.

Computing the test statistic and p-value in minitab express