Checking the normality of distribution of test results using minitab software

After performing any type of measurement, a number of data (numbers) are always obtained, which must be discovered or categorized in order to be able to analyze them. To do this, first, the method of data distribution should be determined. Researchers usually try to find out which data distributions are closest to mathematical functions, so that they can have a correct analysis of the nature of the distribution and calculations on it. In fact, one of the most important statistical distributions is called "normal distribution". Checking the normality of the distribution of test results is a prerequisite for many statistical tests, and one of the softwares to perform this check is minitab software. In this research, in order to check the normality of the results obtained from measuring the vertical rebound of a size 5 rubber outdoor soccer ball, the Anderson Darling method was used with the help of minitab software. The parameter used to judge the normality of data distribution is p-value. According to the obtained result, the p-value ≥ 0.05, which indicates the normality of data distribution.