Is this valid or invalid? Nick wants to determine the most popular sports in his school of 500 students he puts the names of all the students in a box draws 100 of them and surveys them. All he determines that soccer is the most popular sport in school.
This survey method may not be valid. By only surveying 100 out of 500 students, there is a possibility of sampling bias. The results may not accurately represent the opinions of all students in the school. Additionally, there may be other factors influencing the popularity of sports at the school that are not accounted for in this survey.
