For example, it may not be practical to collect weight data for all the students attending a large university. Sampling is often used in statistical experiments because in many cases, it may not be practical or even possible to collect data for an entire population. While a population represents an entire group of objects or observations, a sample is any smaller collection of said objects or observations taken from a population. A statistical population does not have to be some group of people it can consist of heights, weights, test scores, temperatures, and so on. In the context of statistics, a population is an entire group of objects or observations. A higher standard deviation indicates values that tend to be further from the mean, while a lower standard deviation indicates that the values tend to be closer to the mean. Standard deviation is a statistical measure of variability that indicates the average amount that a set of numbers deviates from their mean. Home / probability and statistics / descriptive statistics / sample standard deviation Sample standard deviationĪ sample standard deviation refers to the standard deviation of sample rather than that of a population.
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