Homework Help: Psychology

Posted by summer on Monday, September 19, 2011 at 7:26pm.

Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test (with an estimated population standard deviation of 3); the control group has a mean of 35 (with an estimated population standard deviation of 5). Using the .05 level, what should the experimenter conclude?

Question- Sketch the distributions involved

No one has answered this question yet.

Answer this Question

Related Questions

Psychology - Twenty students randomly assigned to an experimental group receive ...
sattistics - Twenty students randomly assigned to an experimental group receive ...
Statistic - 18. Twenty students randomly assigned to an experimental group ...
Statistic - Twenty students assigned to an experimental group receive 30 in a ...
Statistic - Twenty students assigned to an experimental group receive 30 in a ...
psychology - In an experiment, a control group is different from an experimental...
Psychology - A psychologist is performing an experiment involving a controlled ...
statistics - Twenty (20) students randomly assigned to an experimental group are...
psychology - Random assigment can be described as a research method: A used to ...
psychology - Random assignment can be described as a research method: used to ...

For Further Reading

First Name:
School Subject:
Answer: