If the diameter is 1.83, the circumference is 6.21, the pi experimental is 3.39 and the experimental average for pi is 3.12, what is the deviation

The deviation can be calculated by subtracting the experimental average for pi from the known value for pi experimental:

Deviation = pi experimental - experimental average for pi
Deviation = 3.39 - 3.12
Deviation = 0.27