Durations of sunshine (in hours) in Amritsar for first 10 days of August 1997 as reported by the Meteorological Department are given below:
9.6, 5.2, 3.5, 1.5, 1.6, 2.4, 2.6, 8.4, 10.3, 10.9
(i) Find the mean \(\overline{X}\)
(ii) Verify that \(\displaystyle\sum_{i=1}^{10} (\text{x}_i - \overline{\text{X}})=0\)