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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