Basically I don't understand histograms.... How can I infer how frequently there were less than 5 inches of snow without knowing the Y axis values?

Do I have to assume that 50% of the distribution is to the left of the median and then eyeball how big the bar 0-5 is compared to the other ones?

a) How frequently did Philadelphia get less than 5 inches of snow?

B) If you wanted to show that years with small amounts of snow are more frequent in the last 50 years than they were a 100 years ago, you should

-Compare the median snowfall in the last 50 years to the median snowfall from 1888-1938.?

-Compare the mean snowfall in the last 50 years to the mean snowfall from 1888-1938.

-Compare the max snowfall in the last 50 years to the max snowfall from 1888-1938.

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