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Horizontal axis (x-axis): midpoints
Vertical axis (y-axis): frequency
Axes
The number of data values in each interval.
Frequency
Each interval is represented by its midpoint.
Midpoints
These are groups of data (e.g., 0–10, 10–20, 20–30).
Class Intervals
a type of graph used in statistics to show how data is distributed.
frequency polygon
is a type of graph that uses points connected by straight lines to show how data changes over time or across values.
line graph
are facts, numbers, or information that are collected for analysis.
data
are data that are organized into intervals or categories instead of listing each value separately.
Grouped data
