female (N=165)
male (N=168)
Mean Std. Dev. Mean Std. Dev. Diff. in Means Std. Error
X 173.4 99.1 175.2 98.0 1.8 10.8
bill_length_mm 42.1 4.9 45.9 5.4 3.8 0.6
bill_depth_mm 16.4 1.8 17.9 1.9 1.5 0.2
flipper_length_mm 197.4 12.5 204.5 14.5 7.1 1.5
body_mass_g 3862.3 666.2 4545.7 787.6 683.4 79.9
year 2008.0 0.8 2008.0 0.8 0.0 0.1
N Pct. N Pct.
species Adelie 73 44.2 73 43.5
Chinstrap 34 20.6 34 20.2
Gentoo 58 35.2 61 36.3
island Biscoe 80 48.5 83 49.4
Dream 61 37.0 62 36.9
Torgersen 24 14.5 23 13.7