Now, in addition tothat, ifyouwereananalystwhowastryingtostudyanepidemicortopredicttheadoptionofaproduct, for example, whatyoucoulddoisyoucouldpickarandom sampleofthepopulation, alsohavethemnominatetheirfriendsandfollowthefriendsandfollowboththe randoms andthefriends.TED소리듣기여기에덧붙여 만약여러분이전염병을연구하거나혹은예를들어 제품의판매경향을예측하는분석가시라면여러분은전체인구에서무작위로대상을선정그들이친구를지명하도록하고그친구를따라 무작위로뽑힌사람과그가지명한친구를함께관찰합니다.