Welcome to America

A couple weeks ago, the professor released midterm grades. I thought I did horrible and was a bit depressed. Two weeks later, all of sudden, I got curious about how others in the class did, so I asked my smart brother about average and standard deviation.

It has been 10+ years already since I had my last class in statistics, so the term mean, median, average, standard deviation, blah, blah are the whole new world to me now.

The conversation started off by asking "If the average is 75, and standard deviation is 15, can you guess max/min?"

My brother responded that the highest is probably low-90s and the lowest is in 50s, while most were probably on the right side of 75.

OK, he lost me right there.... so let me give him the real numbers... and I did.

Two things:

- How dare he call me "dude"

- Welcome to America