A data set on cognition contains variables including : Variable Description
Age Age in years
History Family history of dementia or Alzheimer's disease:
1 = Yes
2 = No
3 = Unknown
IQ Intelligence quotient score (1-100)
Cog_score Cognitive health score (1-50)
Income Annual Income level:
1 = Up to $10,100
2 = $10,001 - $40,000
3 = $40,000 - $60,000
4 = Over $60,000
Use this information to answer the following question.
Which would be the most appropriate graph to investigate the variable Age?