Physics I Lab Manual 2011 11

Physics I Lab Manual 2011 11 - Experiment 1 Statistics...

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Unformatted text preview: Experiment 1 Statistics Objective To quantify the statistical fluctuations in your measured reaction time and to use these statistics to determine if your reaction time to clutch your hand is the same for both hands. In the process you will demonstrate the significance (or lack thereof) of errors in measurement through statistical analysis and the propagation of uncertainty in measured quantities to the uncertainty of values calculated from these quantities. Theory All measured quantities have inherent uncertainty. By expressing the size of the uncertainty in a measurement along with the measured value you can express the range of values consistent with your measurement. Consider the example of a bus driver who is asked how high his bus is. He might look at the bus and state that it is 3 m high, however if you told him the bridge that he has to pass under has a clearance of 3.1 m he might not be confident his bus will pass under. Why? Because he knows that his statement that his truck is 3 m high was only a guess and has a significant amount of uncertainty. If he were to give the keys to another driver at the end of his shift and were to tell her “the bus is 3 m high” she might assume it is safe to drive under the bridge with a clearance of 3.1 m. In common practice we’d use phrases like “the bus is 1 ...
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This note was uploaded on 01/27/2012 for the course PHY 2048l taught by Professor Staff during the Fall '08 term at University of Central Florida.

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