Cluster sampling refers to a type of sampling method . With cluster sampling, the researcher divides the population into separate groups, called clusters. Then, a simple random sample of clusters is selected from the population. The researcher conducts his analysis on data from the sampled clusters.
If you are running around an actual football field (100 yds x 50 yds) a mile would be 5.9 laps (1 mi = 1760 yds/300 = 5.86667). A standard racetrack around a football field should be 440 yds, so 4 laps should be a mile there (1760/440 = 4).
Best Answer: 1 yard equals three feet. You do the math and it is 300 feet...... Technically, a football field is 120 yards long (ten yards for each endzone) So really a football field is 360 feet long. One yard on an american football field is equal to two feet. The field is one hundred yards two hundred feet and each end zone is ten yards  twenty feet. Total of two hundred forty feet. They call it a yard because  the ball is on the 86 foot line sounds funny.