Help Please?? 12. Of the following, which one is an observational study? A. Asking hearing-impaired people to try a new style of

Question

4 years ago

13

Help Please?? 12. Of the following, which one is an observational study? A. Asking hearing-impaired people to try a new style of

earphone to get their opinion B. Comparing survival rates between treating bone cancer with surgery versus treating it with radiation C. recording the daily output of a balloon factory for 6 months D. polling people on their favorite color I believe it would be 'C', yes?

Mathematics

2 answers:

EleoNora [17] · Answer 1 · 2022-02-13T19:41:33+03:00

EleoNora [17]4 years ago

6 0

I don’t really kno but it should be d

Semmy [17] · Answer 2 · 2022-02-13T20:57:28+03:00

Semmy [17]4 years ago

4 0

The answer to your question is d