Which of the following statements is true about cluster sampling? Once clusters are selected, participants are randomly selected from those clusters.
Cluster selection does not have to be random, as long as each chosen cluster is randomly sampled.
Cluster sampling uses clusters, which are homogenous groups in regard to characteristics being studied.
Participants within clusters usually live within close proximity, which saves time and money for data collection.

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.