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Determine the precision and accuracy of these data for warfarin.

| Sample | Known Concentration | Experimentally Determined Values |
|----------------|----------------------|-------------------------------------------|
| Sample 1 | 23.2 ng/mL | 34.5, 19.6 ng/mL, 24.9, 21.7, 21.6, 25.8 |
| Sample 2 | 65.9 ng/mL | 60.3, 46.5, 59.1, 78.4, 58.0, 61.1 |
| Sample 3 | 239 ng/mL | 251 ng/mL, 231, 209, 255, 201, 227 |

Calculate precision and accuracy based on the given data.

Answer :

Final answer:

The precision and accuracy of the data for warfarin can be determined by calculating the standard deviation and percent error for each sample.

Explanation:

The precision of data can be determined by calculating the standard deviation of the experimentally determined values for each sample. To determine accuracy, the percent error between the experimentally determined values and the known concentration can be calculated.

Sample 1:

  • Precision: Standard Deviation = 4.08 ng/mL
  • Accuracy: Percent Error = 9.48%

Sample 2:

  • Precision: Standard Deviation = 8.18 ng/mL
  • Accuracy: Percent Error = 8.17%

Sample 3:

  • Precision: Standard Deviation = 18.5 ng/mL
  • Accuracy: Percent Error = 5.43%

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