A data analyst creates a report that identifies the middle 50% of the collected data. Which of the following best describes the analyst's findings?

The interquartile range (IQR) is defined as the difference between the third quartile (Q3 - 75th percentile) and the first quartile (Q1 - 25th percentile) of a dataset, thereby representing the central 50% of data values when ordered from lowest to highest.

The difference between mode and median is not a standard statistical measure that represents the middle 50% of data; mode indicates the most frequent value, and median is the middle value.

Mean variance measures the spread of data points around the mean, representing the average squared difference from the mean, not the specific range of the middle 50% of values.

Skewness measures the asymmetry of the probability distribution of a real-valued random variable about its mean, describing the shape of the data, not the middle 50% range.