School newspaper staff went to three different sports games to survey students on their favorite sport, and the results are shown in the table below. Are these samples biased? Why or why not?Favorite Sport SurveySample 1Sample 2Sample 3Basketball23Basketball1Basketball1Football2Football24Football2Volleyball0Volleyball0Volleyball22
Answer
A
These samples are not biased because students like different sports and the samples reflect the different opinions.
B
These samples are biased because the newspaper staff went to a basketball game, football game, and volleyball match to interview the students.
C
These samples are not biased because each has a total of 25 students, which makes them equal.
D
These samples are biased because 0 should never appear in a sample as it is not possible.
Explanation
The students were surveyed at basketball, football, and volleyball games, so each sample is likely to include more fans of the sport being played there. That makes the results unrepresentative of students at school overall. Therefore, the samples are biased because of where the students were surveyed.
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