why does standard error of mean and error propagation differ what is the difference between standard error of mean and error propagation why do standard error of mean and error propagation differ? how do errors vary between variables? how do standard error and error propagation differ? how do standard error of mean and error propagation differ why does error propagation differ how does the standard error of normal mean and error propagation differ what is the standard deviation of the standard error of error (sem) how to calculate error propagation how do error propagation and standard error differ why does standard error of mean differ what is standard error and error propagation which error propagated from the standard error? why does standard error of mean and error propagation differ? which of the following is the correct standard deviation of error propagation? which factor can be used to calculate average over a two variable period? why does the standard error of means and error propagation differ and what does that mean what is standard error and average average over two variables