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Table 4 Comparison of AQI means by type and year with adjustment for unequal variances and sample sizes with Tamhane’s T2

From: How stable is program quality in child care centre classrooms?

  Year 0 Year 1 Year 2
Diff SE t adj. p > t Diff SE t adj. p > t Diff SE t adj. p > t
CM vs. CS 0.10 0.06 1.76 n.s 0.14 0.05 2.92 < 0.05 0.21 0.06 3.86 < 0.001
NS vs. CS − 0.01 0.06 − 0.22 n.s 0.00 0.04 0.01 n.s 0.04 0.04 0.83 n.s
NM vs. CS 0.05 0.04 1.22 n.s 0.09 0.04 2.27 n.s 0.06 0.04 1.26 n.s
M vs. CS 0.38 0.05 7.74 < 0.001 0.41 0.05 9.15 < 0.001 0.40 0.05 7.87 < 0.001
NS vs. CM − 0.11 0.05 − 2.32 n.s − 0.14 0.04 − 3.58 < 0.01 − 0.18 0.04 − 4.05 < 0.001
NM vs. CM − 0.05 0.05 − 1.02 n.s − 0.05 0.04 − 1.34 n.s − 0.16 0.04 − 3.69 < 0.001
M vs. CM 0.28 0.05 5.34 < 0.001 0.27 0.04 5.99 < 0.001 0.19 0.05 3.71 < 0.001
NM vs. NS 0.06 0.03 2.11 n.s 0.09 0.03 3.26 < 0.05 0.02 0.03 0.66 n.s
M vs. NS 0.39 0.04 10.49 < 0.001 0.41 0.03 11.81 < 0.001 0.37 0.04 9.60 < 0.001
M vs. NM 0.32 0.04 9.15 < 0.001 0.32 0.03 9.35 < 0.001 0.35 0.04 9.31 < 0.001
  1. CS commercial single, CM commercial multi, NS non-profit single, NM non-profit multi, M municipal