DETAILS STATSQC1 15.1E.009.5. MY NOTES ASK YOUR TEACHER PRACTICE AND Public health and safety officials have classified the Zika virus as a hazardous threat to pregnant women in Brazil, A study based in Rio found the virus to be more active near a bo water that was found to be polluted. A study of 20 water samples found an average chemical waste of 122 g per mile with a standard deviation of 15.73 g. LA USE SALT (a) What are the degrees of freedom for this study? (b) Find the 95% confidence interval (In g per mile) for this study (use a table or technology. 'Round your answers to three decimal places.) g per mile.. (c) What would happen to the margin of error if the sample size increased ()It would also increase. It would decrease. It would stay the same. It would go to zero. (d) What would happen to the margin of error if the confidence level increased? O it would also increase. It would decrease It would stay the same. It would go to zero. 7:05 PM