Nati randomly selected 10 girls and 10 boys from her 7th grade class and recorded their heights in inches. The results are shown below.
Girls: 55, 57, 58, 58, 59, 60, 61, 62, 63, 64
Boys: 57, 57, 58, 58, 60, 62, 62, 65, 65, 66
Which group shows more variability in height?