- #1
Gavroy
- 235
- 0
hi
i have some measured values that refer to a simple experiment where a stone was thrown along a fixed length and now i have these values for the time the stone needed
time 13.8 13.7 13.9 13.5 14.4 14.6 14.1 14.3 13.9 14.7
i was asked to explain how many decimal places one would write down when one determines the mean value of this set?
well, i guess it is only one, as none would be pretty uncertain and more than one would be pointless.
but then i was also asked, how many values i would need(these are 10) in order to be able to write down another decimal place and also how many values i would need to write down a third decimal place and so on. is there any rule or does anybody here have an idea what an appropriate number might be?
i have some measured values that refer to a simple experiment where a stone was thrown along a fixed length and now i have these values for the time the stone needed
time 13.8 13.7 13.9 13.5 14.4 14.6 14.1 14.3 13.9 14.7
i was asked to explain how many decimal places one would write down when one determines the mean value of this set?
well, i guess it is only one, as none would be pretty uncertain and more than one would be pointless.
but then i was also asked, how many values i would need(these are 10) in order to be able to write down another decimal place and also how many values i would need to write down a third decimal place and so on. is there any rule or does anybody here have an idea what an appropriate number might be?