---
data_dictionary: fev (.csv, sas7bdat, .sav, .txt)

copyright: >
  The author of the jse article holds the copyright, but does not list
  conditions under which it can be used. Individual use for educational
  purposes is probably permitted under the Fair Use provisions of
  U.S. Copyright laws.

description: >
  Forced Expiratory Volume (FEV) in children. The data was collected 
  in Boston in the 1970s.

additional_description:
  https://jse.amstat.org/v13n2/datasets.kahn.html
  https://jse.amstat.org/datasets/fev.txt

download_url:
  https://jse.amstat.org/datasets/fev.dat.txt

format:
  csv: comma delimited
  sas7bdat: proprietary (SAS)
  sav: proprietary (SPSS)
  txt: fixed width
  
varnames: 
  not included
  
missing_value_code:
  not needed
  
size:   
  rows: 654
  columns: 5

vars:
  age:
    scale: ratio
    range: positive integer
    unit: years
    
  fev:
    label: Forced Expiratory Volume
    scale: ratio
    range: positive real
    unit: liters
    
  ht:
    label: Height
    scale: positive real
    unit: inches

  sex:
    value:
      0: Female
      1: Male

  smoke:
    value:
      0: Nonsmoker
      1: Smoker
---