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------------------------------------------------ Which of the following statistical expressions represents a method to summarize information about a data set? Descriptive statistics Regression analysis Scatter diagram Confidence interval

Descriptive statistics, including measures of central tendency and measures of dispersion, provides a summary of a data set. Unlike other methods, it efficiently summarizes data without predicting values or estimating parameters.

Explanation:

The correct answer is Descriptive statistics. Descriptive statistics is a branch of statistics that deals with methods related to collecting, summarizing, presenting, and interpreting data sets.

It includes measures of central tendency (mean, median, and mode) and measures of dispersion (range, variance, standard deviation), which helps to get a summary of the data set.

While regression analysis is used in predicting the values, scatter diagram is used for visualizing the data, and confidence interval is used to estimate population parameters from sample data, none of these alternatives, like descriptive statistics, summarises data.

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