Drew conducted a survey of a simple random sample of high school seniors about
their plans after graduation. 65% responded: "Attend a four-year university." A week
later, Jane also conducted a survey of a simple random sample of high school
seniors about their plans after graduation. 68% responded: "Attend a four-year
university.
What could explain the difference in their results?
A. Samples vary from one another even if each sample is selected in a proper and random manner.
B. The surveys were conducted at different times of day.
C. The researchers were of different genders.
D. High school seniors change their minds often..