Question

which sample fairly represents the population? select two options
measuring the height of every fiftieth person on the school roster to determine the average height of the boys in the school
calling every third person on the soccer teams roster to determine how many of the team members have completed their fundraising assignment
observing every person walking down main street at 5 p.m. one evening to determine the percentage of people who wear glasses
sending a confidential e - mail survey to every one - hundredth parent in the school district to determine the overall satisfaction of the residents of the town
taking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch

Explanation:

A fair sample should be representative of the population. Measuring every fiftieth person on the school roster to find average height of boys in school is random within the school - population. Taking a poll in the lunch - room where all students eat lunch to find number of students who want to leave campus during lunch samples from the entire student population present at lunch. Calling every third person on the soccer team roster only samples from the soccer team, observing people on Main Street at 5 p.m. only samples from people on Main Street at that time, and sending an email to every one - hundredth parent in the school district only samples from parents and not all town residents.

Answer:

1. measuring the height of every fiftieth person on the school roster to determine the average height of the boys in the school
2. taking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch