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Old 11-03-2009, 09:39 AM   #1
xtreme2001
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Correlation Matrix table - Help

Hi everyone,

I'm looking for some advice on an assignment.

Attached is the correlation matrix table I am to analyze.

Questions:
1. What is the strongest predictor of teacher stress? Why?
2. What does the value -0.10 mean to you?

My thoughts on this were: The strongest predictor of teacher distress is noted as a correlation score of positive 0.70. This score illustrates a positive correlation. As the amount of tasks increase per day so does the teacher's stress. The -0.10 value tells me that as the age of the teachers increases, the personal supervision decreases. This is a negative correlation, or an inverse relationship.

Am I right with my answers? Is there other pieces of information that I'm missing and should be included to support my answers?

Thanks.
Attached Files
File Type: doc Correlation Matrix of Study Variables.doc (27.0 KB, 5 views)
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Old 11-03-2009, 10:06 AM   #2
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First one, you interpreted well (.70).
Second one, you cannot establish the relation based on the correlation. because it is not a strong correlation. Check the p -values for the correlation.( number of observations also plays role in interpretation).

Also look the below that may help.
http://en.wikipedia.org/wiki/Correla...mply_causation
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Old 11-03-2009, 10:40 AM   #3
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Thank you.

For the second question (-0.10) that is the only information I am presented with. If it assumed that it is a weak correlation, which it is, what else can I say to express a discussion? Is it a weak correlation because it it not closer to -1.00? Again, I don't have any further data - just the table and the question.

Thanks!
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Old 11-03-2009, 11:12 AM   #4
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You can say there is a weak, negative association between the two variables.
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Old 11-03-2009, 12:26 PM   #5
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Thanks. I guess you can't really say much about a weak correlation
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