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).
Four laps around a standard outdoor track in lane 2 is 1.01 miles, while four laps in lane 1 is 0.99 miles. Running in lanes that are further from the center of the track results in running slightly longer distances. For instance, four laps in lane 8 is 1.13 miles. Continue Reading.