how to do this phsyics q?

an experimenter gets a range of data: 8.8 * 10^-19 plus or minus 0.1 * 10^-19. this is an experiment about charge. is this range of error acceptable?

hi sarah,
 
this is about electricity and magnetism, right?  (coulomb)?  (electrons and protons)
 
one of my physics textbook says this:
 
note that 1 c is substantial amount of charge.  in typical electrostatic experiments, where a rubber or glass rod is charged by friction, a net charge of the order of 10-6 c is obtained.  in other words, only very small fraction of the total available charge is transferred between the rod and the rubbing material.
 
basically, 1.0 x 10-6 c or 0.1 x 10-5 c will be the maximum net charge that can be obtained (by rubbing).  so, this amount of charge (0.1 x 10-19 c = 1.0 x 10-20 c) is acceptable (to my knowledge).
 
10-6  =  1.0 x 10-6 (1 micro-coulomb)
 
 
coulomb's law applies exactly only to point charges or particles.
 
from another physics textbook that i have says this:
 
coulomb and you
 
by human standards, the coulomb is definitely a great deal of charge.  we are accustomed to taking our charge in far smaller doses, usually in the form of sparks that carry much less than a micro-coulomb (1.0 x 10-6 c).  usually robbing will build up charge on an ordinary-size object with density of up to 10 nano-coulombs (1.0 x 10-9 c) per cm2, which is a practical limit beyond which there will tend to be discharging into the air.
 
(0.1 x 10-19 c = 1.0 x 10-20 c).  compare that to 0.1 x 10-5 c or 1.0 x 10-6 c.  much and much smaller.  right?
 
i hope these concepts from my textbooks helps.