A disadvantage of stratified sampling is: Group of answer choices that it requires you to have some prior knowledge about the elements in the population prior to drawing the sample. that it denies you the use of probability theory. that it usually increases the standard error. that it usually requires samples that are larger in size than those required by simple random sampling.

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices