John said Mary could know about the error is she calculated the standard error of the mean and the coefficient of variation.
1 answer
Yes, calculating the standard error of the mean and the coefficient of variation can help Mary to know about the error. The standard error of the mean is a measure of the variability of a sample mean, and the coefficient of variation is a measure of the relative variability of a sample. By calculating these two values, Mary can get an idea of the amount of error in her data.