A Researcher Randomly Assigns Individuals to Two Groups, One in Which

Multiple Choice

A researcher randomly assigns individuals to two groups, one in which calming instrumental music is played softly and another in which no music is played. The researcher collects time on task, measured in minutes. The research question is: Is there a greater average time on task for individuals who had music as compared to individuals who did not have music? Which one of the following represents how the NULL hypothesis will be written?

A) Time on task differs on average for individuals with music as compared to without music.
B) The average time on task for individuals with music is the same as the average time on task for individuals without music.
C) The average time on task for individuals with music is less than or equal to the average time on task for individuals without music
D) The average time on task for individuals with music is greater than or equal to the average time on task for individuals without music