MiniTab is a Home & Education software developed by Minitab Inc. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Minitab:
Access a complete set of statistical tools, including Descriptive Statistics, Hypothesis Tests, Confidence Intervals and Uncover the relationships between variables and identify important factors affecting the quality of your goods and services. Monitor your processes over time and evaluate their stability. Determine if your measurement systems are adequate, assess how well your processes meet specification limits, create sampling plans, and more.