A school psychologist wants to test the effectiveness of a new method of teachin

Question

A school psychologist wants to test the effectiveness of a new method of teaching Health. She recruits 600 fourth-grade students and randomly divides them into thw groups. Group 1 is taught by means of the new method, while Group 2 ls taught via traditional methods. The same teacher is assigned to teach both groups. Al the end of the year, an achievement test is administered and the results of the two groups compared ts What is the response variable in this experiment? O A. The score on the achievement test O B. The students' ability in Health ° C. The score of Group 2 on the achievement test O D. The score of Group 1 on the achievement test Which of the following explanatory variables is manipulated? O A. Intelligence rary O B. Teacher ° C. Method of teaching O D. Grade leve How many levels of the treatment are there What type of experimental design is this?

Explanation / Answer

a]

In the given problem we want to test the effectiveness of new method of teaching. Hence here the score of the students is response variable.

So option A is correct answer that is The score on the achievement test.

b]

Option A is not correct

Because Intelligence is the possibility of the explanatory variable but in this particular problem we test which method of teaching is best? and teacher is not change same teacher teach both methods in this scenario method of teaching is explanatory variable.

Hence Option C is correct answer

c]

here there are 2 levels of treatments because we have two methods of teaching and we apply these methods on students.

d]

here these groups randomly divided and treat as blocks for analysis

and the experimental design is Randomized Block Design.

So option B is correct

e]

here subjects are our selected 600 students. Because we performed this experiments on these 600 students.

Hence option C is correct

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