Table 1.
The descriptive data for failure load values of test groups.
| Test group | Number | Mean (N) | Standard deviation (N) | Min. (N) | Max. (N) | 95% confidence interval | |
|---|---|---|---|---|---|---|---|
| Lower bound | Upper bound | ||||||
| NC | 11 | 364.28a | 114.88 | 219.30 | 616.50 | −296.46 | 432.10 |
| SC | 11 | 324.57a | 89.25 | 220.10 | 471.4 | −271.88 | 377.53 |
| LC | 10 | 207.26b | 90.62 | 110.10 | 369.00 | −151.05 | 263.47 |
Items in the rows with dissimilar letters are significantly different at 95% level of confidence; avalues are nonsignificantly different at P = 0.81; bvalue is significantly different at P = 0.004.