Adam asked every teacher at his school how long it took them to travel to work. Adam's results are summarised in the summary statistics below.
n=84∑x=3581∑x2=184 092 n = 84 \quad \sum x = 3581 \quad \sum x^2 = 184\,092 n=84∑x=3581∑x2=184092Calculate the mean and the standard deviation for these data.
