Question

In an experiment, the refractive index of glass was observed to be $1.45,1.56,1.54,1.44,1.54,1.44,1.54$ and $1.53$. Calculate mean value of refractive index.

Answer 1

${\mu }_{mean}=\frac{1.45+1.56+1.54+1.44+1.54+1.44+1.54+1.53}{8}$

$=1.505=\underset{}{1.51}$

upto $3$ significant digits.