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?\nrandom and biased\nrandom and unbiased\nnonrandom and biased\nnonrandom 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?\nrandom and biased\nrandom and unbiased\nnonrandom and biased\nnonrandom and unbiased

Answer

Answer:

nonrandom and biased

Brief Explanations:

Li only selected students from her first - period class. This is not a random selection as it doesn't give every student in the middle school an equal chance of being chosen. Also, students in the same first - period class may share similar characteristics (e.g., similar schedules, similar academic levels in some cases), which can introduce bias in the survey results about all middle - school students' comfort with fractions.