cottlea01
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you measure the mass of an apple using a balance.you get these tree measurements:
trial 1: 167.0g
trial 2: 166.9 g
trial 3: 167.2 g
you know that the true mass of the apple is 172 g. describe your results in terms of precision and accuracy. explain your answer

Respuesta :

Answer:

The three results are precise. This is because they are all within 0.3 g of one another. However, the results are not accurate, because they are all about 5 g away from the correct value for the mass of the apple.

Oseni

The result from the repeated measurement of the mass of apple are close to each other but far from the true mass of the apple. The result is precise but not accurate.

  • The precision of a measurement refers to the closeness of the values when measured repeatedly.
  • The accuracy of a measurement refers to the closeness of the measured value (s) to the true (predetermined) value.

The average of the 3 measurements of the mass of the apple is:

167+166.9+167.2/3 = 167.03g

The difference between the mean measurement and the true mass of the apple is:

172 - 167.03 = 4.97g

In this case, the repeated measurements are close to each other with a range of 0.3 but far from the true mass of the apple with a difference of 4.97.

Hence, the closeness of the measurements means that it is precise while the distance between the measurement and the true value means that it not accurate.  

More on precision and accuracy can be found here: https://brainly.com/question/18974348

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