Description. Performs a t-test for the comparison of the means of two independent samples. This test is not performed on data in the spreadsheet, but on statistics you enter in a dialog box.escription. Performs a t-test for the comparison of the means of two independent samples. This test is not performed on data in the spreadsheet, but on statistics you enter in a dialog box.
The states with the most weather-related disasters topping more than $1 billion are Texas, Missouri, Alabama, Georgia, Tennessee and South Carolina, which each had at least 31 expensive events in the past 30 years.
Accumulated from the past 114 years, their system tells us what the most common catastrophes are and how to prepare those looking for insurance. The U.S. disasters have the highest common occurrence, with 735 instances between storms, floods and tropical cyclones. Severe storms are the most likely. In 2013 alone, 54 percent of disasters were classified as storms, amounting to a total of $12.46 billion in insured losses for the year according to Aon Benfield.