A researcher wants to obtain a sample of 25 teachers from a school district employing 400 teachers in 8 schools. Choose the BEST method for doing this.
Responses
A Select the teachers whose students have the highest grade point averages in the system.Select the teachers whose students have the highest grade point averages in the system.
B Ask the principal of each school to choose 3 teachers, then select the 25th teacher randomly.Ask the principal of each school to choose 3 teachers, then select the 25th teacher randomly.
C Randomly select 12 male teachers, 12 females, and then randomly select a 25th teacher of either sex.Randomly select 12 male teachers, 12 females, and then randomly select a 25th teacher of either sex.
D From an alphabetized list, select a teacher randomly, then select every 16th teacher on the list until 25 names are obtained.From an alphabetized list, select a teacher randomly, then select every 16th teacher on the list until 25 names are obtained.
E To get the best information possible, choose the 25 teachers with the most experience in the system, breaking any ties randomly.