Which symbol represents the point estimator of the population standard deviation?

The point estimator of the population standard deviation is represented by the letter "s." This symbol denotes the sample standard deviation, which is used to estimate the population standard deviation (σ). When conducting statistical analysis, particularly in the context of inferential statistics, we often do not have access to the entire population data. Instead, we rely on samples, and the sample standard deviation serves as a valuable substitute for estimating the variability present in the broader population.

In many statistical methodologies, the sample standard deviation is computed from a randomly selected sample, allowing researchers to make inferences regarding the population's spread or dispersion characteristics. This provides a means to assess reliability and variability within the gathered data while keeping in mind that it is an estimate and subject to sampling error.

The other symbols represent different statistical measures that are not related to the point estimator of the population standard deviation. For example, "μ" denotes the population mean, "σ" represents the true population standard deviation, and "θ" typically stands for a parameter in a statistical model or distribution. By understanding these distinctions, one can more effectively use statistical concepts in practical applications.