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hw <strong>questions</strong> ch11.3#29 survey about commuter rail, how do you choose sample? why?stratified sample...and stratify by different neighborhood, since rail will affect peopleif different neighborhoods differentlycluster v stratified samplingex) survey condition of wildlife preservescan you go to everyone?no...to make it easier to get around, go to a cluster in Washington, in New York, inWyoming, etc (once youre in Wyoming, drive around to all or most)i.e. out of 50 states, pick 4 randomly, <strong>the</strong>n visit all sites in each stateex of randomized block design)experiment to find out <strong>the</strong> effectiveness of Title 5 advising program for bmcc LAstudentsget a sample of 40 bmcc LA studentsquestion:- is <strong>the</strong> Title 5 advising program effective?experimental group: goes into <strong>the</strong> programcontrol group: does not go into programtreatment: go into <strong>the</strong> advising programresponse variable:results of student surveyrate of graduationsampling method: randomrandom block design:- split <strong>the</strong>m into male and female- half <strong>the</strong> males go into <strong>the</strong> program, half dont- half <strong>the</strong> females go into <strong>the</strong> program, half dont

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