# chem

posted by
**lyn**
.

a mean = 0.5, and the standard deviation is 1.84*10^-3 ( gassian statistic apply). How many replicated if the standard error of the mean is not excess 0.001%.

Please help, thank you so much

posted by
**lyn**
.

a mean = 0.5, and the standard deviation is 1.84*10^-3 ( gassian statistic apply). How many replicated if the standard error of the mean is not excess 0.001%.

Please help, thank you so much