Posted by AL on Monday, December 21, 2009 at 9:54pm.
Suppose a researcher wants to study the effectiveness of a new reading program for students who have not acquired the necessary reading skills by the time they reach the 8th grade. A randomly selected group of 50 students from a local junior high with poor reading skills will undergo a special reading program. Another group of 50 randomly selected students with poor reading skills will undergo regular reading classes. A month later, the reading skills of all 100 students are assessed to determine whether the program was successful.
What is the research hypothesis in this example?

8th grade  Ms. Sue, Monday, December 21, 2009 at 11:20pm
The hypothesis is that the special reading program will improve the students' reading skills.

Statistics  PsyDAG, Tuesday, December 22, 2009 at 10:12am
The hypothesis is a little more specific than indicated by Ms.Sue — that the special reading program will improve the student reading skills more than the regular program.
Ho (null hypothesis): mean change of special group = mean change of regular group
H1 (alternate hypothesis): mean change of special group > (is greater than) mean change of regular group
I hope this helps a little more.
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