A professor in a probability class gives a student a coin, and instructs the student to determine whether the coin is a fair coin (that is, whether it has the same likelihood of landing on heads as landing on tails). The student flips the coin 500 times and records the outcome each time. They then find the proportion of heads and tails obtained in the 500 flips and create a histogram from the data. The set of observed outcomes (heads and tails) along with the proportions obtained by the student is