Question

44 students completed some homework and the histogram shows information about the times taken. Work out an estimate of the interquartile range. In your working you must show the lower and upper quaratiles

Answer 1

1.4×5=7 0.8×10=8 1.4×10=14 1×15=15 15+14+8+7=44 44÷4=11 LQ of 44=11 LQ=10 minutes 11×3=33 UQ= 29 minutes The Range is 19 minutes