I’m going to show you the answer
- Surveying the boys in the freshman class is biased. It doesn’t take a sample from all of the school, it is from only one grade and one gender.
-Surveying every other student in the cafeteria would be biased IF only a certain grade was in there at a certain time. If every student was in the cafeteria at the same time, it would be non biased.
-Students in her math class is biased- it only considers those in a certain class, not everyone.
-20 from each grade at random is NOT biased, it considers every grade and 20 random students.
-Chess club is biased. Only students in one particular group get to answer. Hope this helps!
Answer:
im confused on the signals you put.
Step-by-step explanation:
Answer:
63
Step-by-step explanation:
7, 14, 21, 28, 35, 42, 49, 56, 63, 70.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90.
A:63