NYC: Snow in April --- is it really abnormal?

Only summary data are available. I plotted the boxplots using five-number summaries provided. Some of the maximums are regarded as outliers by R.



R code: snow.R

In Spring 2005, I used a new example for w1111: snow falls in NYC. And that spring, we had record amount of snow. My students said that I jinxed it. :)

Well, today is absolutely not my fault.