1. Dany and Jon are partners in a biology lab. They want to grow a bacterium in broth culture at two different pH levels (acidic or neutral) to see differences in optical density (cells/mL) after 24 hours of growth. They measured 30 samples at each pH level over several weeks and recorded the room temperature (C) in the lab each time. Since it was a time-consuming process, they took turns collecting data and kept track of who recorded each observation in case as a control variable. After conrming all relevant assumptions, they ran a GLM predicting optical density: Estimate Interce ut 4.88 H acidic Room Temerature Observer_J on 0.97 a. Calculate the test statistics for each predictor variable in the model. Which are signicant predictors of optical density? Given: critical = 1.97 b. Interpret the estimate for pH_acidic in context. 0. Interpret the estimate for Room Temperature in context. (1. If Jon measured a neutral culture during a time when the lab was 21C and got an optical density of 42.0 cells/mL, What would be this observation's residual