Question

(1 point) When every possible sample with the same number of observations is equally likely to be chosen, the selected sample is called: A. cluster sample OB. simple random sample C. biased sample D. stratified sample A pharmaceutical company, interested in measuring how often physicians prescribe a certain drug, has selected a simple random sample from each of two groups: MD. (medical doctors) and DO. (doctors of Osteopathic). What type of sampling is this? A. Stratified random sampling B. Cluster sampling C. Simple random sampling D. None of the above

Answer 1

TOPIC : Sampling procedures.

ナ Exnanation :- in case a imple vandam sampling method,thore is tal N' nits in the opalatian, 따 and we want a sample size n' druom the population, then thure are total N ponible sanple (i the ampung is done uoith rep lacement and ore a total without melacements So, in ease of sRswR, we qeoy even possible sample Can be chosen with probalilitt and, in case sesw R, we get, eu with hraobabili so, ev besible mple with the same number observations ;n equay-uly友be chosen hey to be chosen dence, the ans wen İs

The co net answen is 2 A. Stratied n andon sample Explanaton Me know, in ease f stnatiked nandom samhling, at diest we divide the w hola popu la tion into sevenal strata J.where, each stnata ara homogeneous within the msetves, but they hawe dilferent chaaacte nisties, when conとared to each othen tene, the bopulaton has bean divi ded ito into wo stnata z m D. and D0t, than vi2- we dnaw samples uom each stnata, eaing imple yean dom _a ampling method, so, thio example 엄→ISto