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.
Florida. In Florida, Katrina made landfall in South Florida on August 25 as a Category 1 hurricane with 80 mph winds. It produced heavy rainfall, amounting to 14 inches in Homestead, Florida. Also, a storm surge of 3-5 feet was reported in parts of Monroe County as Katrina slammed ashore.urricane Katrina was the costliest natural disaster in U.S. history, causing around $108 billion (2005 USD) in damage. Katrina was the eleventh named storm of the 2005 Atlantic hurricane season, fifth hurricane, third major hurricane, and the second Category 5 hurricane of the season.