Q2) Temperature was measured in eight locations in
a room, and the values obtained were $24.2^\circ$, $25.0^\circ$, $18.5^\circ$,
$23.1^\circ$, $19.9^\circ$, $23.1^\circ$, $19.0^\circ$ and $20.0^\circ$. Calculate, The Mean
Value, Standard Deviation and Probable error.
$\bar{X} = \frac{\sum_{n=1}^{n} X_n}{n}$
where $\bar{X}$ = Arithmetic
mean
$X_n$ = nth reading taken
$n$ = Total number of
readings
$d_n = X_n - \bar{X}$
$\sigma = \sqrt{\frac{\sum d_n^2}{n}}$
$r = \pm 0.6945\sigma$
