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.
1 Residents told to 'get out or die' as Harvey unleashes more rain The Washington Post. 2  Rain record broken in Texas as Harvey dumps nearly 52 inches FOX News. 3  Harvey May Be One of the Costliest Natural Disasters Ever NBC News. 4  Harvey forces weather service to add new colors to maps CBS News.