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In: Statistics and Probability

*Please show all steps leading to answers* Question: Researchers studying acid rain measured the acidity of...

*Please show all steps leading to answers*

Question:

Researchers studying acid rain measured the acidity of precipitation in a Colorado Wilderness area for 150 consecutive weeks. Acidity is measured by pH. Lower pH values show higher acidity. The acid rain researchers observed a straight-line pattern over time. They reported that the least-squares regression line: pH = 5.3 - (.0053 * weeks) fit the data well.

A. According to the regression line, what was the pH at the beginning of the study (week - 1)? At the end (weeks = 150)?
B. What is the intercept of the regression line? Explain clearly what the intercept says about the pH of the precipitation in this wilderness area.
C. What is the slope of the regression line? Explain clearly what this slope says about the change in pH of the precipitation in this wilderness area.

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Expert Solution

orchestra answered 2 years ago
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