Now that you've determined your friend's height including uncertainty (181 cm 3cm) you decide to solve the following experimental problem:

Determine the smallest rectangular volume that your friend could stand up in.

The method you come up with is to ask the same 4 people to help measure your friend's left-to-right width and front-to-back depth. Together with the previously measured height, you'll determine the resulting volume .

Trial	Width (cm)
1	52 cm
2	50 cm
3	53 cm
4	52 cm

What is the average value of the width, in cm?