Melissa proposes to collect classroom observations of troublemaking behavior and observations of aggression on the school playground. The observational ratings will be made by the children's teacher, who will also observe playground aggression. Melissa should be concerned about .

the fact that she only has one data type represented in her research.She should plan to collect some S-or L-data.

Explanation:

is there answer choices?

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.