Ron intends to survey spectators at the Quidditch World Championship to find out which team the most
spectators support.
Which of the following survey methods will allow Ron to make a valid conclusion about which team the
most spectators support?

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected