SOLUTION: 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 knowled
Algebra.Com
Question 467235: 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? (a) Use the steps of
hypothesis testing, (b) sketch the distributions involved, and (c) explain your
answer to someone who is familiar with the t test for a single sample but not
with the t test for independent means.
Answer by Big Poop(157) (Show Source): You can put this solution on YOUR website!
RELATED QUESTIONS
Twenty students randomly assigned to an experimental group receive an
instructional... (answered by stanbon)
Twenty students randomly assigned to an experimental group receive an
instructional... (answered by stanbon)
A group of 12 persons are available for use in a study. Four are to be selected to... (answered by harpazo)
In an attempt to increase mathematics scores at a particular school, a twelve hour... (answered by Theo)
. A medical researcher wishes to try three different techniques to lower blood pressure... (answered by stanbon)
One well-known psychological experiment measures reaction time (RT) to a stimulus in... (answered by stanbon)
A migraine is a particularly painful type of headache, which patients sometimes wish to... (answered by Boreal)
7. A clinical trial is run to investigate the effectiveness of an experimental drug in... (answered by stanbon)
A BEHAVIORAL PSYCHOLOGIST CONDUCTS AN EXPERIMENT TO DETERMINE WHETHER OPERANT... (answered by stanbon)