Statistics Final Ch. 1-3 Questions And Answers 100% Verified A+ Guaranteed

Which sampling method divides the population up into​ sections, randomly selects some of those​ sections, then chooses all the members from the selected sections to​ study? {Ans: } ClusterWhich sampling method subdivides the population into categories sharing similar characteristics and then selects a sample from each​ subdivision? {Ans: } Stratified______ is used when subjects are assigned to different groups through a process of random selection. {Ans: } RandomizationA study is conducted to measure​ children's growth rates without any treatment applied to the children. What best classifies this​ study? {Ans: } ObservationalWhich of the following corresponds to the case when every sample of size n has the same chance of being​ chosen? {Ans: } Simple Random SampleExplain the difference between a​ single-blind and a​ double-blind experiment. {Ans: } In a​ single-blind experiment, the subject does not know which treatment is received. In a​ double-blind experiment, neither the subject nor the researcher in contact with the subject knows which treatment is received.A study of an association between which ear is used for cell phone calls and whether the subject is​ left-handed or​ right-handed began with a survey​ e-mailed to 5000 people belonging to an otology online​ group, and 717 surveys were returned.​