A botanist is studying a newly identified soybean disease. The botanist collected soil samples from all of the soybean fields in randomly selected states to see if there were significant differences the sulfur levels in fields with and without the disease.

1. What is the population?
-all u. s. soil
-all u. s. soybeans

2. What is the sample?
-selected u. s. soil
-selected u. s. soybean fields

3. What is the variable of interest?
-amount of sulfur in soil
-number of soybeans with the disease

4. How was the sample selected?

5. What method was used to collect the data?

6. Is the variable qualitative or quantitative?

7. Is the variable continuous or discrete?