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.
Andrew remained the most devastating natural disaster in U.S. history until Hurricane Katrina in 2005 surpassed all records. More than 250,000 people were left homeless; 82,000 businesses were destroyed or damaged; about 100,000 residents of south Dade County permanently left the area in Andrew's wake.uring August 16 - 28 of 1992 Hurricane Andrew created some 25-30 billion in 1992 worth of damage ($45 billion in 2005 U.S. dollars); thus Andrew is the ranked the most expensive natural disaster in the U.S. history.