Question

task

The cutoff birth date for school entry in British
Columbia, Canada, is December 31. As a result,
children bom in December tend to be the youngest
in their grade, whereas those bom in January
tend to be the oldest. Morrow et al. (2012)
examined how this relative age difference
influenced diagnosis and treatment of attention
deficit/hyperactivity disorder (ADHD). A total
of 39,136 boys aged 6 to 12 years and registered
in school in 1997– 1998 had January birth dates.
Of these, 2219 were diagnosed with ADHD in
that year. A total of 38,977 boys had December
birth dates, of which 2870 were diagnosed with
ADHD in that year. Display the association
between birth month and ADHD diagnosis
using a table or graphical method from this
chapter. Is there an association?

Answer 1

TOPIC:Chi-square test for association.