A researcher studies children in elementary school and finds

A researcher studies children in elementary school and finds a strong positive linear association between height and reading scores. Does this mean that taller children are generally better readers? What might explain the strong correlation? Medical researchers followed 1,435 middle-aged men for a period of 5 years, measuring the amount of baldness present and the presence of heart disease. The correlation was 0.08 between the two variables. Are they correct in concluding that this shows baldness is not a possible cause of heart disease? Why or why not?

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