Mathematics
Grade 8
15 min
Identify representative, random, and biased samples Probability
Identify representative, random, and biased samples Probability
Tutorial Preview
1
A principal surveys 100 students chosen randomly from a list of all 1000 students. Is the sample representative?
2
To find the most popular pizza, a shop owner only asks customers who order pepperoni. Is this sample biased?
3
A coach needs to pick 3 players from 15 for a drill. He picks the first 3 in line. Is this a random method?
Sample Practice Questions
Easy
To see if a new gym is needed, a school surveys only the basketball team. Is this sample biased or representative?
0.Biased
1.Rep.
Easy
A teacher puts all 25 student names in a hat and draws one. Is this sampling method random?
0.Random
1.Not Random
Easy
To find the student body's favorite subject, a principal surveys every 10th person on the school roster. Is this sample representative?
0.Rep.
1.Biased
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