A bar chart that depicts the frequencies of numerical or measurement data.

Question

Options

• ASample
• BHistogram
• CCheck Sheet
• DProcess Map

• A
  4% (2)
• B
  85% (41)
• C
  2% (1)
• D
  8% (4)

Explanation

B (Histogram) is correct because a histogram is specifically defined as a bar chart that displays the frequency distribution of numerical or measurement data - the bars represent ranges (bins) of values, and their heights show how often data falls within each range.

• A (Sample) is wrong because a sample is a subset of data collected from a population, not a chart type - it's what you measure, not how you display it.
• C (Check Sheet) is wrong because a check sheet is a tally-based data collection form used to record how often events occur, not a graphical display of frequency distributions.
• D (Process Map) is wrong because a process map (flowchart) visually depicts the steps and flow of a process, not the distribution of measurement data.

Memory tip: Think "HIS-to-GRAM = HIS data shows how often" - the histogram is the go-to tool in the 7 Basic Quality Tools for showing the shape and spread of continuous measurement data (like weight, length, or cycle time).

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