Question

The accompanying histogram shows the lengths of ring fingers (in millimeters) for a sample of eighth-graders. Complete parts (a) through (c) below.

Answer 1

Answer:

a) 88 mm

b) 83.0 mm

Explanation:

a) By mere observation, the approximated mean finger length is 88 mm

b)The mean is calculated as follows:

$\begin{gathered} \bar{x\text{ }}=\frac{2(60)+7(70)+8(80)+4(90)+4(100)+1(110)+1(120)}{27} \\ \bar{x\text{ }}=\frac{2240}{27} \\ \bar{x\text{ }}=82.96 \end{gathered}$

The mean = 83.0 mm