N

Mean

Std. Deviation

Std. Error

95% Confidence Interval for Mean

Minimum

Maximum

Lower Bound

Upper Bound

Ketac

16

11.42

2.8683

0.7171

9.890

12.947

6.6

16.1

RelyX

16

3.22

0.9275

0.2319

2.725

3.713

1.8

6.0

Unicem 2

16

7.39

2.1728

0.5432

6.230

8.545

2.5

10.3