Which one of the following is the name of a sampling strategy used when collecting a truly representative sample is difficult or impossible? A. Bias-free sampling
B. Convenience sampling
C. Randomized sampling
D. Normalized sampling

Which characteristics are true of the arabian desert? choose all answers that are correct.has land mostly below sea levelcovers almost the entire arabian peninsulacontains the largest sand sea in the worldhas very few people living there