Question

Find the class boundaries, midpoints, and widths for each class.

1.58-62

2.125-131

3. 16.35-18.46

4. 16.3-18.5

Answer 1

Solution:

1.

58-62

class boundaries: upper = 62 , lower = 58

midpoint = $\dfrac{62+58}2=60$

width = $62-58=4$

2.

125-131

class boundaries: upper =131, lower =125

midpoint =$\dfrac{131+125}2=128$

width =$131-125=6$

3.

16.35-18.46

class boundaries: upper = 18.46, lower =16.35

midpoint =$\dfrac{18.46+16.35}2=17.405$

width =$18.46-16.35=2.11$

4.

16.3-18.5

class boundaries: upper =18.5 , lower =16.3

midpoint = $\dfrac{18.5+16.3}2=17.4$

width = $18.5-16.3=2.2$