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9. On a test, Rohana got 65% or 39 of problems correct. How many problems were on the test? 10. An insurance company would like to determine the proportion of all medical doctors who have been involved in one or more malpractice lawsuits. The company selects 500 doctors at random from a professional directory and determines the number in the sample who have been involved in a malpractice lawsuit. Identify the parameter Identify the sample Identify the population 11. Determine whether the given sampling is systematic, stratified or cluster a) An interviewer in the mallis told to survey every fourth shopper as soon as it opens. A researcher randomly selects 8 of the 70 hospitals in a metropolitan area and then surveys all of the surgical doctors in each hospital b) c) A researcher segments the population of car owners into four groups. Ford, GM Chrysler and Foreign. She obtains random sample from each group and then conducts a survey
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166 Parameter P10や lim Au medica dectos who have besh Buwe shopper

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