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

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The paper "Accelerated Telomere Shortening in Response to Life Stress"(Proceedings of the National Academy of Sciences [ 2004]: 17312-17315) describes 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) are from a scatterplot in the paper. Telomere length is a measure of cell longevity.
The paper €œAccelerated Telomere Shortening in Response to Life Stress€(Proceedings

a. Compute the equation of the least squares regression line.
b. What is the value of r2 for this data set? Write a sentence interpreting this value in context.
c. What is the value of se for this data set? Write a sentence interpreting this value in context.
d. Is the linear relationship between perceived stress and telomere length positive or negative? Is it weak, moderate, or strong? Justify your answer.

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