You run a study to explore how length of song (short, long) and genre of music (pop, classical) effect mood. You find a significant main effect for length of song. This means

Group of answer choices

Ratings of mood are different depending on whether the song was short or long.

Ratings of mood are different depending on whether the song was pop or classical.

Ratings of mood are the same regardless of whether the song was short or long.

Ratings of mood depend on both length of song and genre of music.