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Topic: Correlation problem
Replies: 2   Last Post: Jul 2, 1996 11:17 PM

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 Dan Tu Posts: 3 Registered: 12/18/04
Correlation problem
Posted: Jun 25, 1996 9:11 AM

We want to find what questions in survey are highly correlated to overall
score. We picked a group of questions based on practical meaning and
calculated the average score of these questions for each survey. The
correlation between the average score and overall score is pretty high.
Here are the 3 questions:
1. How do I determine the cause of the high correlation? Is it because
these questions really have big influence on overall score or just
because the average score is the result of two many questions (it's clear
that the correlation between the average score of all questions and
overall score is 1)?
2. How can I find a group of questions that are really high_correlated to
overall score? (correlation between each individual question and overall
score is known)
3. Are there any good references on correlation analysis?