A researcher has investigated the relationship between IQ an

A researcher has investigated the relationship between IQ and grade point average (GPA) and found the correlation to be .75.

Solution

IQ and GPA have a positive correlation of 0.75

As the correlation is positive and 0.75, it gives idea that higher IQ influences to 75% of GPA.

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The remaining 25% can be attributed to the interest in the subject, time available, resources available for preparation, health conditions, natural calamities, etc.