Question

The diameter of a wire as measured by screw gauge was found to be $2.620,2.625,2.628and2.626cm$. Calculate mean value of diameter.

• A. 2.625 cm
• B. 2.62 cm
• C. 2.63 cm
• D. None of the above

Answer 1

The correct option is A 2.625 cm

Mean value of diameter:

$a_m=\frac{2.620+2.625+2.628+2.626}{4}$
$=2.6247$ $cm$
$=2.625$ $cm$ (rounding off to three decimal places)