1. A person wishes to determine if a relationship exists between the air quality of a city and the absentee rates in its schools due to illness. Which would be a correct statement of the null hypothesis for this research?

Group of answer choices

There is no relationship between air quality in a city and the absentee rates due to illness in its schools.

The air quality of a city most likely has some impact on school absentee rates, but the strength of the relationship is not yet known.

There would seem to be a correlation between air quality and absentee rates, but it needs to be studied further.

There is an inverse correlation between air quality in a city and the absentee rates in schools due to illness.