“Create a histogram of 100 sampled 500 mL bottles using 2 mL fill-volume bins from 494 to 506 mL with frequencies 3, 12, 31, 34, 15, and 5.”
図の背後にある意思決定を読み解く。
Record fill volume in milliliters.
Use two-milliliter bins for the sample.
Compare the spread with formal specifications outside the histogram.
Use this histogram as an initial view of fill consistency in a quality-control sample.
よくある質問
Why use a histogram in quality control?
It shows the distribution and spread of measurements, helping teams spot shifts, skew, or unusually broad variation.
What is nominal fill volume?
It is the labeled target amount the filling process is intended to deliver.
Does a centered histogram prove compliance?
No. Compliance also depends on the applicable specification limits, sampling plan, and measurement accuracy.