Table 8 The results of t-test performed on CP values.

From: Effects of dodecyl amide, nano calcium carbonate, and dry resin on asphalt concrete cohesion and adhesion failures in moisture conditions

Groups

Levene’s test

t-test

Variances

F

Sig.

t

df

ρ-value (2-Tailed)

Dry

1 F-T cycle

Equal

0.019

0.892

2.889

26

0.008

Not equal

2.889

25.629

0.008

1 F-T cycle

2 F-T cycle

Equal

0.998

0.327

3.272

26

0.003

Not equal

3.272

24.160

0.003

Control

0.5% NCC

Equal

0.212

0.652

−0.846

14

0.08

Not equal

−0.846

13.914

0.09

Control

1% NCC

Equal

0.874

0.366

−2.844

14

0.013

Not equal

−2.844

13.163

0.014

Control

2% dry resin

Equal

0.121

0.733

−0.817

14

0.06

Not equal

−0.817

13.926

0.06

Control

4% dry resin

Equal

0.671

0.426

−2.657

14

0.019

Not equal

−2.657

13.170

0.020

Control

0.5% dodecyl amide

Equal

0.094

0.763

−1.298

14

0.215

Not equal

−1.298

13.890

0.216

Control

1% dodecyl amide

Equal

0.110

0.745

−2.000

14

0.065

Not equal

−2.000

13.952

0.065

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