Pulmonary Disease The data in the table below concern the mean triceps skin-fold thickness in a group of normal men and a group of men with chronic airflow limitation. Group Mean sd n 1.37 0.51 40 Chronic airflow limitation 0.99 0.47 32 Normal You can use the Distribution Calculators page in SALT to find percentiles to answer parts of this question. (a) What is the standard error of the mean for the normal group? (Round your answer to four decimal places.) 0.08380 x What is the standard error of the mean for the chronic airflow limitation group? (Round your answer to four decimal places.) 0.0831 (b) Assume that the central-limit theorem is applicable. What does it mean in this context? (Round your answers to four decimal places.) ✔✔ with mean = 1.37 ✔ane It means that the distribution of mean triceps skin-fold thickness from repeated samples of size 40 drawn from the population of normal men can be considered to be normal varlance = It also means that the distribution of mean triceps skin-fold thickness from repeated samples of size 32 drawn from the population of men with chronic airflow limitation can be considered to be with mean = 0.99 and variance = 0.0063 X normal

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