The data set provided contains the variable F0 that was determined for a large random sample of all tornadoes in the United States in 2017. The Fujita scale is used to describe the range of wind speed. What is the purpose of the variable F0 in the data set?
1) To measure the intensity of tornadoes
2) To determine the frequency of tornadoes
3) To classify tornadoes based on their wind speed
4) To analyze the geographical distribution of tornadoes