Question

a student performed an analysis of a sample for it's calcium content and got the following results: 14.92%, 14.91%, 14.88%, 14.91%. The actual amount of calcium in the sample is 15.70%. What conclusion can you draw about the accuracy and precision of these results?

Answer 1

The student's results for the calcium content of the sample are slightly inaccurate but have good precision.

Step-by-step explanation:

The student's results for the calcium content of the sample are 14.92%, 14.91%, 14.88%, and 14.91%. The actual amount of calcium in the sample is 15.70%. The accuracy of the results can be determined by comparing the average of the results to the actual amount of calcium. The precision of the results can be determined by looking at the range or the difference between the highest and lowest result.

To determine accuracy, we calculate the average of the results: (14.92% + 14.91% + 14.88% + 14.91%) / 4 = 14.91%. Since the actual amount is 15.70%, the average result is slightly lower, indicating a slight inaccuracy.

To determine precision, we calculate the range: 14.92% - 14.88% = 0.04%. The range is small, indicating good precision as the results are close to each other.

In conclusion, the results are slightly inaccurate but have good precision as they are close to each other.

Answer 2

The question is asking to state the conclusion that can be formulated, base on the problem or the given analysis of the data, about the accuracy and precision  and base on my research, i would say that the Accuracy is Poor but the Precision is Good. I hope this would help you