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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Anim Behav. 2012 Oct 1;84(4):795–803. doi: 10.1016/j.anbehav.2012.06.034

Table 2.

Experiment 3: mean order of bag recovery by quantity and shell state

Panzee
LSD = 1.20
Sherman
LSD = 1.30

object mean s.d. objects recovered
significantly earlier
object mean s.d. objects recovered
significantly earlier
9N 2.70 1.49 none 9N 2.35 1.57 None
7N 2.75 1.48 none 7N 3.58 2.63 none
5N 2.30 2.00 none 5N 4.50 2.73 9N
3N 4.23 2.44 9N, 7N, 5N 3N 7.25 1.92 9N, 7N, 5N, 9S, 7S
1N 5.28 2.35 9N, 7N, 5N 1N 7.98 1.12 9N, 7N, 5N, 9S, 7S, 5S, 3S
9S 7.10 1.74 all N 9S 4.18 2.21 9N
7S 7.30 1.84 all N 7S 4.15 2.33 9N
5S 7.53 1.51 all N 5S 6.48 1.86 9N, 7N, 5N, 9S, 7S
3S 7.68 1.62 all N 3S 6.68 1.45 9N, 7N, 5N, 9S, 7S
1S 8.15 1.51 all N 1S 7.88 1.18 9N, 7N, 5N, 9S, 7S, 5S

LSD = least significant difference statistic (Conover 1999, p. 371), N = no shell, S =shell, s.d. = standard deviation. The differences in the mean ranks must exceed the LSD value to be considered statistically significant at the 0.05 level. For example, Panzee took 9N significantly earlier in the recovery sequence than 3N, 1N, and all five S bags.