A student suspects that there is a relationship between the amount of sunny weather in a given state and the amount of solar energy used by its inhabitants. In order to find out if this idea is correct, the student will need which information for each state

The number of sunny days in a year, and the number of houses that use solar energy in a year.

Explanation:

Since the study seeks to examine the correlation between solar output and the amount of solar energy utilized by inhabitant, a useful information to seek from the states to be included in the study are the numbers of sunny days in a year, and the number of houses that use solar energy in a year. This information can be correlated to get the result of the study.