If you want to conduct a study to determine how much people exercise from a certain town, what would be the most representative sample? An equal number of male and female students from the local...

If you want to conduct a study to determine how much people exercise from a certain town, what would be the most representative sample?

• An equal number of male and female students from the local community college


• Every 10th person leaving the most popular gym in the town


• People leaving McDonalds between 4pm and 6pm


• Calling randomly selected cell phone numbers of people living in the town