Standard deviation is the measure of the dispersion of the statistical data. Learn the definition of standard deviation and variance, formulas along with the solved examples.

In statistics, the standard deviation is a measure of the amount of variation of the values of a variable about its mean. [1] . A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range.

2020年9月17日 · The standard deviation tells you how spread out from the center of the distribution your data is on average. Many scientific variables follow normal distributions, including height, standardized test scores, or job satisfaction ratings.

2024年9月20日 · Standard deviation is a fundamental concept in statistics that measures the dispersion of data points which defines the extent to which data points in a dataset deviate from the mean, providing a clear sense of the variability or spread within the data.

The standard deviation (SD) is a single number that summarizes the variability in a dataset. It represents the typical distance between each data point and the mean. Smaller values indicate that the data points cluster closer to the mean—the values in the dataset are relatively consistent.

Standard deviation is a measure of dispersement in statistics. “Dispersement” tells you how much your data is spread out. Specifically, it shows you how much your data is spread out around the mean or average. For example, are all your scores close to the average? Or are lots of scores way above (or way below) the average score?

2025年1月2日 · Standard deviation is a statistical measure that shows how much a group of data is spread out or dispersed from its mean value (average). A smaller standard deviation value indicates that the values are close to the mean, whereas a larger value means the dataset is spread out further from the mean.

Standard deviation is a statistical measure of variability that indicates the average amount that a set of numbers deviates from their mean. The higher the standard deviation, the more spread out the values, while a lower standard deviation indicates that …

2024年12月11日 · standard deviation, in statistics, a measure of the variability (dispersion or spread) of any set of numerical values about their arithmetic mean (average; denoted by μ).

2024年11月25日 · The standard deviation (SD) measures the extent of scattering in a set of values, typically compared to the mean value of the set. [1] [2] [3] The calculation of the SD depends on whether the dataset includes the entire target population or merely samples it.