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The ages of 11 students enrolled in an on-line macroeconomics course are given in the following...

The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

Stem     Leaf
----- -----------------------
1 9    9
2 1    5    5    8    9
3 0    1    2   
4 0

Here 1|9 implies 19 years (i.e. the stem represents tens and leaf represents units).

The standard deviation of the age distribution is  years. [Answer up to four digits after decimal]

Incorrect. Tries 2/3 Previous Trie
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