- #1
finerty
- 7
- 0
sry wrong forumn i think
delete please
(right I am doing a physics project and i get a set of results.
say I am measuring height and the error is +-1 cm (easy number)
now say i repeat this and get 10 results now to get the mean i have to add them all together which acording to error rules means i have to add the errors together so i have an error of +- 10cm then i divide by 10 to give the mean now because 10 dosne't have an error nothing happens to the error
this means that using the mean of 10 results gives me a greater error than using just one
this seems to go against the whole point of using repeats
is there a different rule i should use when working out a mean)
delete please
(right I am doing a physics project and i get a set of results.
say I am measuring height and the error is +-1 cm (easy number)
now say i repeat this and get 10 results now to get the mean i have to add them all together which acording to error rules means i have to add the errors together so i have an error of +- 10cm then i divide by 10 to give the mean now because 10 dosne't have an error nothing happens to the error
this means that using the mean of 10 results gives me a greater error than using just one
this seems to go against the whole point of using repeats
is there a different rule i should use when working out a mean)
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