What does the word "Experiment Uncertainty" mean and discuss its meaning.

Experimental uncertainty accounts for the fact that no
experiment is conducted with perfect conditions.  Despite the degree of sophistication of the
equipment or experimental procedures utilized, there are still ways in which it could be better,
as perfection is humanely unobtainable.  These imperfections in our procedures, measurements, and
equipment leave noise and other random errors in the values that we obtain leaving the true value
an estimation.  That estimation is called the 95% confidence interval, which accounts for this
experimental uncertainty.  This interval indicates that there is only a one in twenty chance that
the true value is not within this interval.