Fourteen Medical Students in Their Last Year of Training Are

Multiple Choice

Fourteen medical students in their last year of training are asked to make diagnostic decisions under three conditions: alone, with two senior doctors present and in a simulation of a chaotic emergency department. Twelve first year medical students are also asked to complete the same task conditions.
-6) The between groups error df will be:

A) 25
B) 24
C) 26
D) 77