Long description: Block221_Fig11

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The image displays a smooth, symmetrical bell curve graph showing the relationship between frequency on the vertical axis and classes on the horizontal axis.

Alt text: The image displays a smooth, symmetrical bell curve graph showing the relationship between frequency on the vertical axis and classes on the horizontal axis.

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  • The graph features a horizontal axis labeled "Classes" and a vertical axis labeled "Frequency".
  • A single, continuous curve is plotted, forming a characteristic bell shape.
  • The curve starts at a low frequency value on the left side (representing lower class values).
  • It rises smoothly to a peak, reaching the maximum frequency near the center of the horizontal axis.
  • After the peak, the curve descends symmetrically, approaching zero frequency as the values on the horizontal axis increase to the right.

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