![]() Population: Is the entire dataset you want to draw a conclusion about. You might have already heard the phrases “sample” and population” standard deviation. Note: 68% of the values are within one standard deviation away from the mean. When the standard deviation value of a dataset with the mean of x̅ is a small number (σ), we can say that most of the data points are within the range of x̅ ∓ σ, and when we say most of the data points, we refer to the normal distribution of the sample. Mathematically, it’s the square root of the variance.Ī low standard deviation shows that the values in the dataset tend to be close to the mean, while a high standard deviation indicates that the data points are further from the mean. In other words, it shows how much the values in a dataset are spread out around the average. The standard deviation is a statistic that indicates the dispersion of the data.
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