To determine how to design an experiment including replication, randomization and control.
The volunteers are divided into two groups randomly.
The treatment in this is the course which is given to only one group and its effect should be observed in multiple students results for the experiment to be statistically significant.
Given information:
An organization offers course to improve the SAT scores of students.
The claim is that there is an increase by average of 50 points when the test for SAT exam is retook.
To verify, 40 volunteers who had taken SAT once are selected.
Explanation:
An Experiment is a study of cause-and-effect between the variables.
40 volunteers should be considered in two groups.
Control:
The variation between the groups receiving different treatments should be limited to the varying factor and other conditions should be similar.
One group would receive course of the organization while other group receives a fake course.
Randomization:
Students are assigned to different groups randomly.
Replication:
The main effect should be observed in multiple students for it to be statistically significant.
Chapter 10 Solutions
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