Question

mean attentiveness scores by leave time condition
mean test score (higher scores indicate greater attentiveness)
test administration
no leave
2 - 4 days leave
1 - 5 weeks leave
which choice best describes data from the graph that support the researchers conclusion?
a in the second test administration, participants who took 2 - 4 days of leave had higher average attentiveness scores than did those who took no leave, but in the third test administration, those who took no leave had higher average scores than those who took 1 - 5 weeks of leave.
b in the first test administration, participants who took 2 - 4 days of leave had lower average attentiveness scores than did those who took 1 - 5 weeks of leave and those who took no leave.
c in both the second and third test administrations, participants who took 2 - 4 days of leave had higher average attentiveness scores than did participants who took 1 - 5 weeks of leave.

Explanation:

We need to analyze the bar - graph to determine which option correctly describes the data. By observing the heights of the bars for different leave - time conditions across the three test administrations, we can check each option. Option A: In the second test administration, the bar for 2 - 4 days leave is higher than the no - leave bar, and in the third test administration, the no - leave bar is higher than the 1 - 5 weeks leave bar, which is consistent with the description in option A. Option B is incorrect as in the first test administration, the 2 - 4 days leave bar is not lower than the 1 - 5 weeks leave and no - leave bars. Option C is incorrect as in the third test administration, the 2 - 4 days leave bar is not higher than the 1 - 5 weeks leave bar.

Answer:

A. In the second test administration, participants who took 2 - 4 days of leave had higher average attentiveness scores than did those who took no leave, but in the third test administration, those who took no leave had higher average scores than those who took 1 - 5 weeks of leave.