HW Score: 85.58%, 22.25 of 26 points Part 2 of 6 Points: 2.5 of 5 Save A scientist estimates that the mean nitrogen dioxide level in a city is greater than 31 parts per billion. To test this estimate, you determine the nitrogen dioxide levels for 31 randomly parts (a) through (e) selected days. The results (in parts per billion) are listed to the right Assume that the population standard deviation is 11. At a = 0.11, can you support the scientist's estimate? Complete 30 19 18 18 39 19 32 17 15 24 33 44 42 16 19 31 36 31 37 19 33 28 39 24 38 39 25 31 19 27 27 (a) Write the claim mathematically and identify Ho and Ha- Choose from the following. O A. Ho: HS 31 (claim) B. Ho: HS 31 O C. Ho: H= 31 Ha H > 31 Ha H > 31 (claim) Ha: H > 31 (claim) O D. Ho: Hz 31 (claim) O E. Ho: H = 31 (claim) OF. HO H 31 Ha H 231 (claim) (b) Find the critical value and identify the rejection region. Zo = (Round to two decimal places as needed.)