Question

A designed experiment is described. Identify the specified element of the experiment.

An education researcher was interested in examining the effect of the teaching method and the effect of the particular teacher on students' scores on a reading test. In a study, there are four different teachers (Juliana, Felix, Sonia, and Helen) and three different teaching methods (method A, method B, and method C). The number of students participating in the study is 258. Students are randomly assigned to a teaching method and teacher. Identify the experimental units.

A. The 258 students participating in the study

B	The three groups of students (those assigned to method A, those assigned to method B, and those assigned to method C)

C	Method A, method B, method C

D	Teaching method and teacher

Answer 1

Ans : A The 258 students.

The experimental unit is that to which treatments are applied.

Here the teaching method and the effect of particular teacher on students' scores on a reading test is being examined.

Hence the participating students would become the experimental units, as the effect of  teaching method and the effect of particular teacher are being studied.

There are 258 students are participating in the study.

Hence

The 258 students participating in the study are the experimental units.

Teaching methods and teachers are the treatments that are applied on the experimental units : 258 students participating in the study