Though the northernmost islands experience a bit of rain, September is largely dry, warm and sunny throughout the islands. High season in Hawaii doesn't start till mid-December, so September is still off-season for the Hawaii tourism industry and deals abound.
T-tests and analysis of variance (ANOVA) are widely used statistical methods to compare group means. For example, the independent sample t-test enables you to compare annual personal income between rural and urban areas and examine the difference in the grade point average (GPA) between male and female students.
A Simple ANOVA in Excel. One of the most important steps in any Six Sigma project is the ANOVA or Analysis of Variance. ANOVA is found in the Analyze phase of the DMAIC methodology (Define-Measure-Analyze-Improve-Control). ANOVA is used depending on the type of data that is available whether it is attribute or continuous and which distribution it follows if the data is not normal.