Australian seagrass study. The abundance of tropical sea-grasses in Australia was the subject of research published in Aquatic Botany (Mar. 1995). Simple linear regression was used to relate the standing crop (y, measured in grams per meter squared) of a seagrass species to the percentage (x) of land covered by the plants. Data collected for n = 12 sites at Rowes Bay, Australia, yielded the following results:
t = 2.34 p-value = .042
a. Give the practical interpretation, if possible, of the estimated y-intercept of the line.
b. Give the practical interpretation, if possible, of the estimated slope of the line.
c. At what a-level is there sufficient evidence of a linear relationship between standing crop and percentage cover of a seagrass species? Explain.
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