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A 20-year-old engineering student complains of episodes of abdominal discomfort, bloating, and diarrhea. The symptoms usually occur after eating, and pain is frequently relieved with bowel movement. She is on a celiac diet and the episodic symptoms persist. Physical examination and diagnostic tests are negative. Colonoscopy is negative for any abnormalities. This is a history and physical consistent with:
Chi-squared Distribution
A statistical distribution that is used to describe the distribution of a sum of squared random variables, often used in hypothesis testing.
Degrees of Freedom
The number of independent pieces of information used in the calculation of a statistic, typically the size of the data set minus the number of parameters estimated.
Area
The measurement of the extent of a two-dimensional surface or shape, typically expressed in square units.
Chi-squared Distribution
A statistical distribution used to test hypotheses about the distribution of observed frequencies in categories compared to expected frequencies.
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