social statistics s a probability samphe probabiliri a very first 20 nases that
ID: 3061536 • Letter: S
Question
social statistics s a probability samphe probabiliri a very first 20 nases that begin with al A represent a hroad cross-section of the population in New York Cs ie depeh for a study she is daing on race relations in the city.Is his She and so on unbil 2 (the sample sise is thus 20 x 26, or 520), Is this d. A social scientist gathers a carefally chosen group of 20 people seniors, 57 juniors, 22 classroom (perhaps 4. An upper-level sociology class has 120 registered students: 34 mores, and 7 freshmen . Imagine that yos b) What is the probability that the student will be a ius by randiom nmber alble). What is the probabilily that the studer rwill there h What is the probability that the student will be a freshman? stratified sample of size 30 from class each e If you are asked to select a proportionate be in the sample? . If instead you are to select a disproportionate sample of size 20 from th freshmen wi cqual numbers of students from each class level in the sample, how manc a there be in the sample? size to Can the standard error of a variable ever be larger than, or even equal in size the 5. deviation for the same variable? Justify your answer by means of both a form sion of the relationship between these two concepts standard etror of When taking a random sample from a very large population, how does the sta o. the mean change when a. the sample size is increased from 100 to 1,600? the sample size is decreased from 300 to 150? b. c the sample size is multiplied by 4? 7. Many television news shows conduct instant" pol by providing an 800 number and an interesting question of the day for viewers to call and answer. Is this poll a probability sample? Why or why not? b. Specify the population from which the sample of calls is drawn. a. 8. The following table shows the number of active military personnel in 2009, by region (Ginclu- ing the District of Columbia). Mountain 89.816 West South 177.36 ific 89,816 West North 6564 East North 26.384 East South 68,440 Central Atlantic Census Bureau, Census Regions and Divisions of the United States (regions). Central South Atlantic Central Central Engla 376,034 Middle 41,441 New 8,579 Source: U.S. Census Bureau, Statistical Abstract of the United States: 2012, Table 508 (data) and US SOCIAL STATISTICS FOR A DIVERSE SOCIETYExplanation / Answer
Solution-
A. Probability sampling is based on the fact that every member of a population has a known and equal chance of being selected. Here whatever be the number of total calls received to answer, when we start picking up the different calls for sampling, then each call has equal chance to be in the sample. Thus it is a probability sample.
B. Population would be total number of calls received.
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