Question

What should we do if while rounding off the ?a mean value we have got a zero also, should we roundoff the answer according to the least significant figure present among the other measured values ignoring zero?

Answer 1

While calculating a mean, the the measured value have the same number of significant digits, as they all are measured by same instruments. a mean should also have same significant digits. If measured value of different number of significant digits after decimal point, then a mean will follow the rule of addition of two numbers