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A 20-Year-Old Engineering Student Complains of Episodes of Abdominal Discomfort

question 39

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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:


Definitions:

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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