You find the the smallest and largest values. The interval is the largest minus the smallest.
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to find an interval you have to subtract the first two number from each other for example 5 10 15 20 the interval for this set of data is 5
What is the convenient scale and interval to use for graphing each set of data set?
In principle, yes. It may require interpolation within the central interval.
A frequency diagram.
An empty space or interval in a set of data refers to a range of values within which no data points exist. This absence can indicate gaps in measurement, missing data, or natural boundaries in the data distribution. Identifying these intervals is crucial for understanding the overall structure and completeness of the dataset, as they may affect statistical analyses or interpretations.