Question

nathan and jordan design surveys to determine the average amount of time bicyclists in a race spend training each week. nathan surveys every fifth bicyclist crossing the finish line after a race. jordan surveys the first five bicyclists to finish the race. which best explains which sample is likely to be the most valid? nathan’s because his sample was more random jordan’s because his sample was more random nathan’s because his sample contained elements of the population jordan’s because his sample contained elements of the population

Explanation:

A valid sample for a survey should be random to represent the entire population of racers. Nathan uses systematic random sampling (every fifth finisher), which selects participants across different finishing times and ability levels. Jordan's sample only includes the first five finishers, a non-random group that likely represents only the fastest cyclists, not the full population. Both samples include population elements, but randomness is the key factor for validity here.

Answer:

Nathan's because his sample was more random