sample mean Alejandra Gonzalez-Beltran Orlaith Burke Philippe Rocca-Serra adapted from: https://onlinecourses.science.psu.edu/stat414/node/66 and http://mathworld.wolfram.com/SampleMean.html last accessed: 2015-11-05 the sample mean of sample of size n with n observations is an arithmetic mean computed over n number of observations on a statistical sample. The sample mean, denoted x¯ and read “x-bar,” is simply the average of the n data points x1, x2, ..., xn: x¯=x1+x2+⋯+xnn=1n∑i=1nxi The sample mean summarizes the "location" or "center" of the data. the sample mean is a measure of dispersion of the observations made on the sample and provides an unbias estimate of the population mean estimate average value metadata incomplete