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.
Five years ago, Hurricane Katrina devastated the Gulf region, killing nearly 2,000 and displacing more than 250,000 others from Louisiana to Florida. This week, in a series titled Hurricane Katrina: Five Years After, FoxNews.com looks back on the costliest natural disaster ever to strike the United States.When Hurricane Katrina ripped through New Orleans, leaving a legacy of death and destruction in its wake, the storm's immediate effects were evident.But now, five years later, the long-term effects on the devastated populationâs mental and physical health still linger.his week, in a series titled Hurricane Katrina: Five Years After, FoxNews.com looks back on the costliest natural disaster ever to strike the United States. When Hurricane Katrina ripped through New Orleans, leaving a legacy of death and destruction in its wake, the storm's immediate effects were evident.