Mean Plus Or Minus Standard Deviation. For the logged data the mean and median are 1 24 and 1 10 respectively indicating that the logged data have a more symmetrical distribution. The sign may also represent an inclusive range of values that a reading might have.
In experimental sciences the sign commonly indicates the confidence interval or error in a measurement often the standard deviation or standard error. The sign may also represent an inclusive range of values that a reading might have. Yet they are conceptually so different that we must wonder whythey areused almost interchangeably in the medical literature.
We see that the majority of observations are within one standard deviation of the mean and nearly all within two standard deviations of the mean.
We see that the majority of observations are within one standard deviation of the mean and nearly all within two standard deviations of the mean. In experimental sciences the sign commonly indicates the confidence interval or error in a measurement often the standard deviation or standard error. To compute the probability that an observation is within two standard deviations of the mean small differences due to rounding. The mean and median are 10 29 and 2 respectively for the original data with a standard deviation of 20 22.
