4400 Higher November 2005 Paper 4 Q8

8 The table gives information about the heights of some plants.

Height, \(h\) cm	Frequency
\(0 < h \leqslant 5\)	4
\(5 < h \leqslant 10\)	6
\(10 < h \leqslant 15\)	8
\(15 < h \leqslant 20\)	2

Calculate an estimate of the mean height.

(4)