Table 4.

t Tests Between Errors on Day 1 Versus Subsequent Days in All Cases, P > .05 showing no significant differences.

	Day 1	Day 2	Day 3	Day 4	Day 5
Mean	1.727	–1.590	–6.143	1.673	6.643
Variance	383.79	433.68	552.92	372.74	152.63
Observations	417	209	20	14	8
Hypothesized mean difference	—	0	0	0	0
df	—	395	20	14	8
t Stat	—	1.916	1.473	0.010	–1.099
P(T<=t) 2-tailed	—	0.056	0.156	0.992	0.304
t critical 2-tailed	—	1.966	2.086	2.145	2.306