Three students made multiple weighings of a copper cylinder, each using a different balance. The correct mass of the cylinder ha

Question

1 year ago

3

Three students made multiple weighings of a copper cylinder, each using a different balance. The correct mass of the cylinder ha

d been previously determined to be 47.32 g. Describe the accuracy and precision of each student's
measurements.
Mass of Cylinder (g)
Lissa Lamont Leigh Anne
Weighing 1 47.13 47.45 47.95
Weighing 2 47.94 47.39 47.91
Weighing 3 46.83 47.42 47.89
Weighing 4 47.47 47.41 47.93

Chemistry

1 answer:

andreev551 [17] · Answer 1 · 2020-09-17T01:06:22+03:00

Answer: Lissa's are measurements are accurate but not precise.

Lammont's measurements are not accurate but precise.

Leigh Anne's measurements are not accurate but precise.

Explanation:

Accuracy is measure of how close a measurement comes to the actual or true value of whatever is measured

Precision is the measure of how close a series of measurements are to each other.

Lissa's measurements are 47.13, 47.94, 46.83 and 47.47. The average of the values is $\frac{47.13+47.94+46.83+47.47}{4}=47.34$ . The average is close to the true value of 47.32 and hence is accurate.The results are not close to each other hence the measurement is not precise. Thus Lissa's are measurements are accurate but not precise.

Lamont's measurements are 47.45 , 47.39, 47.42 and 47.41. The average of the values is $\frac{47.45+47.39+47.42+47.41}{4}=47.42$ . The average is not close to the true value of 47.32 and hence is not accurate. The results are close to each other hence the measurement is precise.Thus Lammont's measurements are not accurate but precise.

Leigh Anne's measurements are 47.95, 47.91, 47.89 and 47.93. The average of the values is $\frac{47.95+47.91+47.89+47.93}{4}=47.92$ . The average is not close to the true value of 47.32 and hence is not accurate. The results are close to each other hence the measurement is precise.Thus Leigh Anne's measurements are not accurate but precise.