maybe i should clarify my point. we take the avearge of our repeated measured values. And also calculate the standerd deviation 'S'. but the standerd deviation 's' is just spread of all our measured values. what we really want is how close our avearge 'X' to real value(which we can never...
I am reading the data analysis. the mean and standerd deviation is just for the sample but not for the population. And what we really want is the error of mean about the real(i do not wana use 'true') value. And from the material on my hand, the error of mean about the real value is standerd...
Questio:we take repeated measurements in experiment, and we can get average x. unfornately, it's not true value of the measuerement. how can we difine the true value?
If we eliminate all systematic errors, take infinite number of measurements and then take the average(by math, it's the...