The paper Accelerated Telomere Shortening in Response to Life Stress (Proceedings of the National Academy of Sciences

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The paper €œAccelerated Telomere Shortening in Response to Life Stress€ (Proceedings of the National Academy of Sciences [2004]: 17312€“17315) described a study that examined whether stress accelerates aging at a cellular level. The accompanying data on a measure of perceived stress (x) and telomere length ( y) were read from a scatterplot that appeared in the paper. Telomere length is a measure of cell longevity.
The paper €œAccelerated Telomere Shortening in Response to Life Stress€

a. Compute the equation of the least-squares line.
b. What is the value of r 2?
c. Does the linear relationship between perceived stress and telomere length account for a large or small proportion of the variability in telomere length? Justify your answer.

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