d through the article, Controls on methane concentrations and fluxes in streams ing human-dominated landscapes (Crawford & Stanley, 2016), and answer the wing questions. Which of the physical and chemical variables from the stream survey had the strongest correlation with partial pressure of CH4 (pCHA)? (1pt) Using the results of the laboratory sediment experiment reported in Table 2, write a full conclusion for the main effect of Site on net sediment CH4 production, citing the appropriate statistics. (2pt) For the post-hoc analysis run on the model reported in Table 2, what type of correction did these researchers use? What significant differences did their post- hoc analysis indicate? (1pt) y and Jon are partners in a biology lab. They want to grow a bacterium in broth re at two different pH levels (acidic or neutral) to see differences in optical density s/mL) after 24 hours of growth. They measured 30 samples at each pH level over ral weeks and recorded the room temperature (C) in the lab each time. Since it was e-consuming process, they took turns collecting data and kept track of who recorded observation in case there were any differences in how each of them measured the ples. After confirming all relevant assumptions and mean-centering room perature, they ran a GLM predicting optical density: Estimate SE Intercept 27.07 4.88 PH_acidic -5.82 1.34 Room Temp (centered) 0.76 0.20 Observer_Jon 1.15 0.97 Room Temp (centered)*pH_acidic -0.14 0.05 Calculate the test statistics for the main effects and interaction term in the model. Given t* = 2.000. Which are significant predictors of optical density? (3pt) Interpret the estimate for pH_acidic in context. (2pt)