Examlex
Which of the following pulmonary function values characterizes an obstructive lung disorder?
I. The forced vital capacity (FVC) is normal or decreased.
II. The forced expiratory volume in 1 second (FEV1) is decreased.
III. The ratio of residual volume to total lung capacity (RV/TLC) is decreased.
IV. RV is increased.
Chi-Square Test
A statistical test used to determine if there is a significant difference between observed frequencies and expected frequencies in categorized datasets.
Independence
A situation in statistics where two events are not influenced by each other, and the occurrence of one does not affect the probability of occurrence of the other.
Chi-Square Statistic
A statistical measure used to evaluate the differences between observed and expected frequencies in categorical variables.
Observed Frequencies
The number of times a particular value or event actually occurs in a dataset.
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