I'm in a pickle right now. I was doing my senior research project on upper-level jet dynamics and Northeast severe weather but I was thinking of perhaps switching to something I was working on with tornadoes but I don't want to do anything that's going to be stupid or wrong. I had been doing a little something (which I started like 7 years ago) about quantifying tornadoes and determining what constitutes as an active or inactive season. I have computed averages and standard deviations using the following periods; 1950 - Present, 1950-1991 average, 1992- Present average, and then I did 15-year intervals...1950-1964, 1960-1974, 1970-1984, 1980-1994, 1990-2004, 2000-2014. Let's say I choose to right now focus on like 1990-2004...I was just wanted to make sure it's not incorrect to compare like 1998 to that 1990-2004 average