---
data_dictionary: exercise.sas7bdat

source: 
  https://stats.oarc.ucla.edu/sas/seminars/analyzing-and-visualizing-interactions/

description: > 
  This dataset is used in a tutorial about
  interactions. A description from the
  original source: The dataset consists of
  data describing the amount of weight loss
  achieved by 900 participants in a
  year-long study of 3 different exercise
  programs, a jogging program, a swimming
  program, and a reading program which
  serves as a control activity. Researchers
  were interested in how the weekly number
  of hours subjects chose to exercise
  predicted weight loss.

copyright:
  No copyright is stated explicitly. You 
  should be able to use this data for
  individual educational purposes under the
  Fair Use guidelines of U.S. copyright law.

format:
  proprietary (SAS)

vars: 
  loss: 
    label: Total weight loss
    note: negative scores denote weight gain
    scale: real
    unit: unknown, presumably pounds
    
  hours: 
    label: Average amount of exercise
    unit: hours per week

  effort: 
    label: weekly effort scores
    note: self report
    scale: non-negative integer
    range: 0 through 50
    direction:
      50 denoting maximum physical effort
    
  prog: 
    label: exercise program
    note: reading is a control
    values:
      Jogging: 1
      Swimming: 2
      Reading: 3

  female: 
    scale: binary categorical
    values:
      male: 0
      female: 1
      
  satisfied: 
    label: satisfied with weight lost
    scale: binary categorical
    values:
      Dissatisfied: 0
      Satisfied: 1
      
---