So the area within one standard deviation of the mean is the value area ... states that the distribution of sample approximates a normal distribution (i.e., becomes symmetric) as the sample ...

The normal distribution is symmetric and has a skewness of zero ... describes a symmetrical plot of data around its mean value, where the width of the curve is defined by the standard deviation.

When the centrosomal PKA presents a logarithmic value outside of the CEP152 symmetric window it was considered as an asymmetric distribution ... are presented as the mean ± s.e.m. from 4 ...