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Ten colonies of juvenile hamsters were established with different densities of animals ranging from 1 to 5 animals per square meter. After 1 week, 3 animals were randomly selected from each colony and their serum corticosterone (a biomarker of stress) was measured (ng/ml). Density Cort Do the following with Excel. 1 3.2 2.8 Make a scatterplot of the data. Cort is the dependent (Y) variable. Print the 3.1 plot below. N 8.5 N 10.2 It should be apparent that the association between Cortland Density is not linear. Let's see if a transformation can render it more linear. Log transform 2 9.9 the Cort variable using the function Lcort = log(cort+1). Make a scatterplot 27.5 of Lcort (Y) vs. Density (X). Note that the association is now quite linear. Print the plot below. 34.0 W 29.8 Do linear regression analysis on Lcort (dependent) and Density 4 97.2 (independent or explanatory) 120.0 105.6 What is the regression equation? 5 330.0 UT 285.0 What is the value of the (unadjusted) coefficient of determination (r?)? 315.5 For the test of whether the slope differs significantly from 0 (either ANOVA or t test), what is the value of p? What do you conclude about the slope? complete sentences