In the context of generic data center services, a cross connect typically refers to the patched connectivity between the data center's facilities and the line of demarcation into the building. It would often be the patched connection between your servers and the Internet access or any additional network connectivity.
standard deviation. a measure of the dispersal of a random variable; the square root of the average squared deviation from the mean. For data that have a normal distribution about 68% of the data points fall within one standard deviation from the mean and 95% fall within two standard deviations. Symbol is Ï.
A related term is Variance. The variance is the standard deviation squared, and the variance is often called the mean squared error. Sample Standard Deviation Definition: The sample standard deviation is the square root of the sum of the squared differences around the arithmetic mean divided by the sample size minus 1.he variance is the standard deviation squared, and the variance is often called the mean squared error. Sample Standard Deviation Definition: The sample standard deviation is the square root of the sum of the squared differences around the arithmetic mean divided by the sample size minus 1.