Final Answer:
On the graph of a frequency distribution, the range of raw scores is typically marked on the X axis, corresponding to option a.
Step-by-step explanation:
In a frequency distribution graph, the X axis (horizontal axis) usually represents the range of raw scores or categories, while the Y axis (vertical axis) typically displays the frequency or frequency density of the scores within those ranges or categories. The range of raw scores refers to the span or extent of values covered by the data set, depicting the minimum and maximum values or the spread of scores. On the X axis, the range of raw scores is delineated, illustrating the continuum of scores or categories represented in the frequency distribution. This axis provides a visual representation of the scores' spectrum, indicating the extent of the data's range covered by the frequency distribution.
Marking the range of raw scores on the X axis allows for a clear representation of the data's spread across various score intervals or categories. It helps viewers comprehend the distribution's coverage of scores, visualizing the minimum and maximum values or the breadth of the data set. As the X axis serves to depict the continuum of raw scores or categories, labeling the range on this axis aids in understanding the data's variability and distributional characteristics, offering insights into the spread and dispersion of the scores within the frequency distribution. Therefore, option a, indicating that the range of raw scores is marked on the X axis, accurately describes the typical representation in a frequency distribution graph.