up to, 1  as far as or approaching (a certain part, degree, point, etc.): She went wading up to her knees. I am up to the eighth lesson. 2  in full realization or attainment of: He worked up to president of the company. 3  as many as; to the limit of: The car will seat up to five persons.
The standard deviation is a measure of how the data is clustered about the mean. For large sets of data, approximately 68.3% of the data lies within one standard deviation of the mean and approximately 95.4% of the data lies within two standard deviations of the mean.
How to Calculate Standard Deviation, Variance - Definition, Formula, Example. How to Calculate Standard Deviation, Variance - Tutorial. Standard Deviation Definition: Standard deviation is a statistical measure of spread or variability.The standard deviation is the root mean square (RMS) deviation of the values from their arithmetic mean. Variance Definition: The square of the standard deviation. A measure of the degree of spread among a set of values; a measure of the tendency of individual values to vary from the mean value.