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.
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