A line graph.
The horzontal axis shows chi-squared with four degrees of freedom and is numbered 0, 5, 10, 15, 20, 25, and 30. The vertical axis is labeled "Probability density" and numbered 0, 0.1, and 0.2.
The graph starts at chi-squared = zero and probability density = zero. It rises very steeply to a mode at chi-squared = 2 and probability density = 2.8. It then descends rapidly, becoming less steep and merging with the horizontal axis at chi-squared = 17. The distribution is highly positively skew.
The area between the curve and the horizontal axis is shaded above chi-squared = 9. The area is labeled "5%".
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This page maintained by Martin Bland.
Last updated: 27 July, 2009.