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We need to explain the relative positioning of the bars in a histogram to the numbers that label the horizontal axis when each of the following quantities is used to label that axis.

In the histogram the bars should be touches each other. The relative positioning of the bars in a histogram which extends horizontally from the lower limit of the class to the lower limit of the next class.

For example, let us the histogram which representing the frequency distributions for the data on days to maturity for short-term investments.

From the diagram, let us consider$30-39$. Here, the lower class limit is,$30$.

In the histogram the bars should be touches each other. The relative positioning of the bars in a histogram which extends horizontally from the lower cut point of the class to the lower cut point of the next class.

For example, let us consider the histogram which representing the frequency distribution for the data on weights of males.

From the diagram, let us consider$120$-under$140$. Here, the lower class cut point is,$120$.

In the histogram the bars should be touches each other. The relative positioning of the bars in a histogram is centered horizontally over the mark of the class.

For example, let us consider the histogram which representing the frequency distributions for the data on days to maturity for short-term investments.

From the diagram, let us consider $30-39$.Here, the class mark is,$\frac{\left(30+39\right)}{2}=\frac{69}{2}=34.5$.

In the histogram the bars should be touches each other. The relative positioning of the bars in a histogram is centered horizontally over the midpoint of the class.

For example, let us consider the histogram which representing the frequency distribution for the data on weights of males.

From the diagram, let us consider$120$-under$140$.Here, the class midpoint is,$\frac{\left(120+140\right)}{2}=\frac{260}{2}=130$.