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 same analysis ranks Ocean County, New Jersey, as the countryâs most dangerous county, when it comes to frequency of natural disasters. Jersey Shore communities in Ocean County are vulnerable to tidal surges and storms like Sandy. Here are the top 15 safest and most dangerous counties as measured by our âdisaster indexâ (more on that below).