In exercise 25, use calculator to find the mean and medians. 25 tornados. Use the f-scale measurements from the tornadoes listed in data set 22 "tornadoes" in appendix B. Among the 500 tomadores,, how many have missing F-scale measurements?

Data set 22 YEAR MONTH F SCALE FATALITIES LENGTH (MI) WIDTH (YD) 1950 3.60 100 1950 34.30 150 1950 0.20 10 1950 0.10 10 1951 - 0.10 10Large Data Sets from Appendix B. In Exercises 25-28, refer to the indicated data set in Appendix B. Use software or a calculator to find the means and medians. 25. Tornadoes Use the F-scale measurements from the tornadoes listed in Data Set 22 "Torna- does" in Appendix B. Among the 500 tornadoes, how many have missing F-scale measurements? (Caution: In some technologies, missing data are represented by a constant such as -9 or 9999.)