User:

Interpret charts to find mean

 Find the mean lenght of little fingers.

Solution:

$mean=\frac{sum\;of\;all\;the\;data}{number\;of\;data}$

$mean=\frac{3\cdot2\;+\;4\cdot5\;+\;5\cdot4\;+\;6\cdot2\;+\;7\cdot2}{15}$

$mean=\frac{72}{15}=4.8\;cm$