Mathematics

Problem

The daily maximum temperatures (in

^{\circ}\!\mathrm{C}

) recorded in a city over eight consecutive days were:

2.4,\ 3.1,\ 4.6,\ 5.0,\ 6.8,\ 7.2,\ 8.0,\ 9.5

.\nCalculate: (a) the variance, and (b) the standard deviation of the temperatures, correct to one decimal place.