# required fxn: 'N est'

# direct
t=300; s=62; n=200
N.est('Deer pop',n,t,s,'direct')

# Chapman
t=300; s=62; n=200
N.est('Deer pop',n,t,s,'Chapman')

# inverse
t=150; s=35; n=100
N.est('Bird pop',n,t,s,'inverse')

# 200 seals caught, tagged, released
# sample of 100 seals
# sample of 100 contains 35 tagged seals

N.est('seals',100,200,35,'direct')

N.est('seals',100,200,35,'Chapman')

N.est('seals',100,200,35,'inverse')