Table 3 Descriptive Details of the Group 2 (Microhardness)( Unit – Hv).

From: Effect of electrical grade glass fibres and silver nanoparticles on the mechanical properties of provisional PMMA material

Subgroup

N

Mean

Std. Deviation

Std. Error

95% Confidence Interval for Mean

Min

Max

Lower Bound

Upper Bound

SG2A

10

15.240

1.3134

0.4153

14.300

16.180

13.9

18.0

SG2B

10

16.070

0.4270

0.1350

15.765

16.375

15.5

16.8

SG2C

10

17.000

0.3742

0.1183

16.732

17.268

16.5

17.8

SG2D

10

13.330

0.4809

0.1521

12.986

13.674

12.7

14.3

Total

40

15.410

1.5500

0.2451

14.914

15.906

12.7

18.0

  1. SG2A – Subgroup 2A – PMMA; SG2B – Subgroup 2B – PMMA + AgNPs; SG2C – Subgroup21C – PMMA + E-glass fibres; SG2D – Subgroup 2D – PMMA + AgNPs + E-glass fibres.
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