(a)[1]
Determine the range.
(b)[2]
Find the mean.
Mathematics 4024 · O Level · Averages and measures of spread
Averages and measures of spread — practice question
The water level, measured in cm, in a river is noted each week for 10 weeks. Relative to the normal level, the water heights are shown below.
$-45, -30, -35, 0, 5, -10, -20, 40, 20, 25$