Researchers collected data on the annual mortality rate (deaths per 100,000) for males in 20 large towns and the water hardness in terms of the calcium concentration (parts per million, ppm) in the drinking water. a) The display to the right shows the relationship between mortality and calcium concentration for these towns. Describe what you see in this scatterplot, in context. 169- O A. There is a fairly weak, positive relationship between calcium concentration and mortality rate. Towns with harder watertended to have lower mortality rates. :3 O 5. There is a fairly strong, negative, linear relationship between calcium concentration and mortality rate. Towns with soer water tended to have lower mortality rates. g O c. There is a fairly strong, negative, linear relationship between calcium concentration and mortality rate. Towns with harder water tended to have lower mortality rates. 65469 276 Calcium (ppm) [3) Here is the regression analysis of mortality and calcium concentration. What is the regression equation? Dependent variable is: Mortality RSquared = 96% S = 57.868 Variable Coefcient SE (Coeff) t-ratio P-value Intercept 1918 39.89 48.08