Question

school psychology. a school psychologist wants to test the effectiveness of a new method for teaching arithmetic using a randomized experiment. she recruits 500 second - grade students in the local school district and randomly divides them into two groups. group 1 is taught by means of the new method, while group 2 is taught by traditional methods. the same teacher is assigned to teach both groups. at the end of the year, an achievement test is administered and the results of the two groups are compared. what is the population of interest?
o second - grade students in the local school district
o all second - grade students learning arithmetic
o 500 second - grade students

Explanation:

The psychologist is interested in the effectiveness of a new teaching method for arithmetic among second - grade students in a local school district. The entire set of second - grade students in the local school district is the group about which inferences are to be made.

Answer:

All second - grade students in the local school district