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21)In order to generalize research findings to a target population, a researcher must be careful to select a(n) A)ad hoc sample. B)representative sample. C)stratified random sample. D)accessible sample. 22)Random sampling is assumed to produce a(n) A)ad hoc sample. B)representative sample. C)reflective sample. D)dependent sample. 23)In a random sample, A)certain participants have a greater chance of selection, although selections are independent. B)certain participants have a greater chance of selection, and the selections are dependent. C)every member of population has equal chance of selection, although selections are dependent. D)every member of population has equal chance of selection, and the selections are independent. 24)Random sampling reduces A)systematic biases. B)unsystematic biases. C)stratified, ad hoc biases. D)unstratified, ad hoc biases. 25)A table of random numbers or a random-number generator program are used in A)choosing samples. B)identifying participants’ numbers during an experiment. C)statistical testing procedures. D)matching participants for matched random assignment. 26)Random selection of a sample from a target population means drawing the sample so that A)every member has an equal chance of being selected. B)the selections are dependent on one another. C)some members have a better chance of being drawn than others. D)the selections can be discarded if they are not to the researcher’s liking. 27)A random sample is a(n) A)unrepresentative sample. B)biased sample. C)unbiased sample. D)ad hoc sample. 28)In selecting a random sample, it is common to A)draw the numbers from a hat. B)draw numbers from the phone book and then reverse them. C)select the numbers while blindfolded. D)draw the numbers from a table of random numbers or use a random-number generator program. 29)Stratified random sampling employs the use of A)subpopulations defined in advance. B)ad hoc samples. C)political polls. D)socioeconomic status as a selection criterion. 30)In ________ sampling, separate samples are drawn from each of several subpopulations. A)subpopulation random B)random C)stratified random D)ad hoc Â

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