When plotting a histogram, which parameter is represented along the X-axis__________?
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Answer: C. Class boundaries
Explanation
Histograms display continuous numerical data by grouping observations into contiguous intervals along the horizontal axis. Class boundaries ensure there are no gaps between adjacent bars in a properly constructed histogram. The horizontal axis represents the measured variable while the vertical axis displays the corresponding frequency. Histograms are graphical representations used to estimate the probability distribution of continuous datasets. Class intervals are subdivided into exact boundaries to accommodate continuous measurements without overlapping gaps. Bar heights in a standard histogram are proportional to the frequency of observations within each interval.
Researchers use histograms to quickly visualize the central tendency and skewness of raw sample measurements. Medical professionals plot patient blood pressure readings on histograms to analyze population health trends. Manufacturing teams rely on histograms to check whether product dimensions conform to engineering tolerances. Class frequency is represented along the vertical axis of the histogram rather than the horizontal axis. Class marks represent the midpoint of intervals but boundaries are preferred for continuous bar placement. Qualitative bar charts use category names on the X-axis rather than continuous numerical class boundaries.
- Subject
- Mathematics
- Category
- Statistics
- Topic
- —
- Difficulty
- medium
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