Nayara wants to know the percentage of each grade level of students at her school who drive to school. She has $4$ grade levels in her school. $\newline$ Which of the following survey methods will allow Nayara to make a valid conclusion about what percentage of each grade level of students drive to school? $\newline$ Choose $1$ answer: $\newline$ (A) Randomly select $48$ students who drive to school and ask them their grade level. $\newline$ (B) Randomly select $12$ students from each grade level and ask whether they drive to school.

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Algebra 2

Find probabilities using combinations and permutations

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Q. Nayara wants to know the percentage of each grade level of students at her school who drive to school. She has

4

grade levels in her school.

\newline

Which of the following survey methods will allow Nayara to make a valid conclusion about what percentage of each grade level of students drive to school?

\newline

Choose

1

answer:

\newline

(A) Randomly select

48

students who drive to school and ask them their grade level.

\newline

(B) Randomly select

12

students from each grade level and ask whether they drive to school.

Identify Representative Sample: Nayara needs a representative sample from each grade level to make a valid conclusion.
Potential Bias in Option (A): Option (A) could be biased because it only includes students who drive, not a random sample from each grade level.
Random Sample in Option (B): Option (B) provides a random sample from each grade level, which can give a valid conclusion about the percentage of students who drive.