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An audit is performed of last year's 15,000 student-aid packages given out by the financial aid office at Tasmania State University. Roughly half of the student-aid packages were less than $1000 (Category 1), about one-fourth were between $1000 and $5000 (Category 2), and another quarter were over $5000 (Category 3). For each audit described below, choose the sampling method the best describes it.
(a) The audit reviews all 15,000 student-aid packages. AnswerSimple random samplingConvenience samplingQuota samplingStratified samplingCensus
(b) The auditor select 200 student aid packages in Category 1, 100 student-aid packages in Category 2, and 100 student-aid packages in Category 3. AnswerSimple random samplingConvenience samplingQuota samplingStratified samplingCensus
(c) The auditor reviews the first 500 student aid packages that he comes across. AnswerSimple random samplingConvenience samplingQuota samplingStratified samplingCensus
(d) The auditor first separates the packages by school (Agriculture, Arts and Humanities, Engineering, Nursing, Social Sciences, Science and Mathematics). Three of the schools are selected at random and further subdivided by major. Ten majors are randomly selected within each school, and then 20 students are randomly selected from each of the selected majors. AnswerSimple random samplingConvenience samplingQuota samplingStratified samplingCensus
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