Question: From the data in Table 3.8 on the workers having low or medium exposure to pulmonary Stressors, estimate the proportion who have an fvc below

From the data in Table 3.8 on the workers having low or medium exposure to pulmonary Stressors, estimate the proportion who have an fvc below 90% of that expected on the basis of age, sex and height. Give 95% confidence interval for this proportion.

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