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Can you please show how I can explain this: A researcher has a large number of data pairs (age, height) of humans from birth to

Can you please show how I can explain this:

A researcher has a large number of data pairs (age, height) of humans from birth to 70 years.He computes a correlation coefficient.

a.Would you expect it to be positive or negative?Why?

b.What would you suggest be a major problem with this approach?

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