Passage V

In a study of human sleep cycles, subjects in 4 different age groups performed a brief mental task at a scheduled time. Immediately following the task, their oral temperatures were taken and then the time for each subject to fall asleep was measured.

The results were averaged for each group. Figure 1 shows how the average time to fall asleep for the 4 groups varied with the time of day that the task was performed. Figure 2 shows:how the average oral temperature of 2 of the groups varied with the time of day that the task was performed.

27. Suppose that there were 4 subjects in each age group, and that in 1 age group the time to fall asleep at 3:30 P.M. for the 4 subjects was 14 min, 11 min, 16 min, and 17 min. Based on Figure 1, these 4 subjects were most likely:

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

According to the question, for this group of people, the average time to fall asleep is (14+11+16+17)/4= 14.5 min; see figure 1, when the abscissa is 3:30 PM, the ordinate About 14.5 is youth (9-13 yrs old)