li designed a survey to determine how comfortable students at her middle school are with fractions. there…

li designed a survey to determine how comfortable students at her middle school are with fractions. there are 600 students in her middle school. the students are equally distributed among grade levels. she selected a sample of 28 students in her first - period class. which best explains lis sample? random and biased random and unbiased nonrandom and biased nonrandom and unbiased

li designed a survey to determine how comfortable students at her middle school are with fractions. there are 600 students in her middle school. the students are equally distributed among grade levels. she selected a sample of 28 students in her first - period class. which best explains lis sample? random and biased random and unbiased nonrandom and biased nonrandom and unbiased

Answer

Brief Explanations:

Li selected students only from her first - period class. This is not a random selection as it doesn't give every student in the school an equal chance of being chosen. Also, students in the same first - period class may share similar characteristics (e.g., similar academic abilities if it's a tracked class), so the sample is likely to be biased and not representative of all 600 students in the school.

Answer:

nonrandom and biased