Big Decision Workbook to determine slope and intercept to predict the probability of hatching at any oxygen concentration. Specifically, we want to know the expected probability of hatching at the mean oxygen concentration of each beach. Therefore, we must enter the mean oxygen as the

independent variable in our linear model and calculate the probability of hatching success as the dependent variable. Using the data you collected in the sanctuary, I calculated the mean and standard deviation of oxygen concentration for each beach: Beach 1has a mean oxygen concentration of 12.9% and a standard deviation of 0.5%. Beach 2 has a mean oxygen concentration of 12.0% and a standard deviation of 0.2%. Directions: For questions 15-16, use the Act II: A Big Decision Workbook and refer to the sheet titled "Q15-16 Hatching Prob (Oxygen)." Use the linear relationship to calculate the expected probability of hatching at the mean oxygen concentration of each beach. For instructions about how to use a linear relationship to calculate the expected probability of hatching, see Step 2 in Appendix 1 of this Mission Memo. Excel tutorial: #14 Predicting the Value of a Variable from a Linear Model; #14 Predicting the Value of a Variable from a Linear Model transcript Calculate the expected probability of hatching on Beach 1 when the mean oxygen concentration on Beach 1 equals 12.9%. Expected hatching success on Beach 1 = 70.9 Calculate the expected probability of hatching at Beach 2 when the mean oxygen concentration at Beach 2 equals 12.0%. Expected hatching success on Beach 2 = 64.4