Which type of chart best illustrates the frequency distribution of errors encountered with a new application?

Which type of chart best illustrates the frequency distribution of errors encountered with a new application?

• A. histogram
• B. control chart
• C. distribution curve
• D. Gantt chart

Answer: (A)

A histogram is the best choice because it displays how often different ranges of values occur, making the frequency distribution of errors easy to see. When you group errors into intervals—such as error counts per hour or per severity bucket—the histogram shows how many observations fall into each bin, revealing the overall shape of the distribution, where errors cluster, and whether there are outliers. This helps you quickly assess whether errors are spread evenly, skewed toward higher counts, or concentrated around a particular value. Other charts aren’t as well suited: a control chart emphasizes variation over time with a center line and control limits, not the overall distribution; a distribution curve (smoothly drawn) represents a theoretical or smoothed distribution rather than actual grouped frequencies; and a Gantt chart is about project scheduling and has no relation to error frequency.

A histogram is the best choice because it displays how often different ranges of values occur, making the frequency distribution of errors easy to see. When you group errors into intervals—such as error counts per hour or per severity bucket—the histogram shows how many observations fall into each bin, revealing the overall shape of the distribution, where errors cluster, and whether there are outliers. This helps you quickly assess whether errors are spread evenly, skewed toward higher counts, or concentrated around a particular value. Other charts aren’t as well suited: a control chart emphasizes variation over time with a center line and control limits, not the overall distribution; a distribution curve (smoothly drawn) represents a theoretical or smoothed distribution rather than actual grouped frequencies; and a Gantt chart is about project scheduling and has no relation to error frequency.