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.
The civil war ended in 1990, but Nicaragua, all but destroyed by decades of fighting, would soon be dealt another tragic blow. In 1998, Hurricane Mitch arrived and became the worst natural disaster in Nicaragua's history; killing over 10,000 people, more than 40,000 homes damaged or destroyed, and most bridges and roads simply washed away.