Which of the following ways will improve the uncertainty on a measurement? Selec

Question

Which of the following ways will improve the uncertainty on a measurement? Select all that apply. Repeat the measurement a number of times and average the result (i.e. measuring once vs. measuring 50 times). Have different people use the same instrument to make independent measurements, and average the result (i.e. you alone make 2 measurements vs. you make one measurement, your lab partner makes another measurement). Changing the method used to obtain the measurement (i.e. hold the ruler vertically instead of horizontally) Changing the instrument used to obtain the measurement (i.e. get a different ruler from another student). Measure a different object using the same instrument (i.e. measuring the mass of a pebble vs. measuring the mass of a large rock).

Explanation / Answer

Result: Multiple trials of the same measurement, you can find the average value and estimate the random uncertainty by looking at the spread of your measurements about that average.

So

Choose Option 1:

Repeat the measurement a number of times andaverage the result

Another Case: For example, you measure the diameter of the baseball assuming it is a perfect sphere. However, the real size of the ball may differ by 1 or 2 mm if you measure in different dimensions. This difference will
determine the uncertainty of your measurement.

Choose Option 3:

Changing the method used to obtain the measurement

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