In a study of bacterial concentration in surface and subsurface water (“Pb and Bacteria in a Surface Microlayer” Journal of Marine Research : 1200– 1206), the accompanying data were obtained.
Summary quantities are
Using a significance level of .05, determine whether the data support the hypothesis of a linear relationship between surface and subsurface concentration.
Answer to relevant QuestionsA sample of n = 10,000 (x, y) pairs resulted in r = .022. Test H0: r = 0 versus Ha: r = 0 at significance level .05. Is the result statistically significant? Comment on the practical significance of your analysis. A sample of n = 61 penguin burrows was selected, and values of both y = trail length (m) and x 5 soil hardness (force required to penetrate the substrate to a depth of 12 cm with a certain gauge, in kg) were determined for ...The accompanying scatterplot, based on 34 sediment samples with x = sediment depth (cm) and y = oil and grease content (mg/kg), appeared in the article “Mined Land Reclamation Using Polluted Urban Navigable Waterway ...The relationship between yield of maize, date of planting, and planting density was investigated in the article “Development of a Model for Use in Maize Replant Decisions” (Agronomy Journal : 459–464). Let y = ...Data from a sample of n = 150 quail eggs were used to fit a multiple regression model relating y = eggshell surface area (mm2) x1 = egg weight (g) x2 = egg width (mm) x3 = egg length (mm) (“Predicting Yolk Height, Yolk ...
Post your question