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.
In addition, the earthquake caused an estimated $25 billion in damage, making it one of the costliest natural disasters in the U.S. history. 5. Sichuan earthquake, China (2008) Cost: $29 billion (by the World Bank) The May 12, 2008, Sichuan earthquake was a deadly earthquake that measured at 8.0 magnitude.