In order to evaluate a spectrophotometric method for the

In order to evaluate a spectrophotometric method for the determination of titanium, the method was applied to alloy samples containing difference certified amounts of titanium. The results (%Ti) are shown below.

Sample                        Certified Value           Mean               Standard Deviation

1                      0.496                           0.482               0.0257

2                      0.995                           1.009               0.0248

3                      1.493                           1.505               0.0287

4                      1.990                           2.002               0.0212

For each alloy, eight replicate determinations were made. For each alloy, test whether the mean value differs significantly from the certified value.