File:Bell telephone magazine (1922) (14775842553).jpg

Identifier: bellvol25telephonemag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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samplesare subject to a certain amount oferror; that is, results will differsomewhat from those that wouldhave been obtained had the totalgroup been covered. Assuming thatthe sample has been properly selected,the extent of the error depends on thesize of the sample: the greater theaccuracy desired, the larger the sam-ple must be. Also, of course, thegreater the number of sub-group com-parisons to be made, the larger thesample must be. It is surprising to many that theactual size of the total group fromwhich a cross-section is to be takenhas relatively little to do with thenumber of interviews required. Ofmore importance is the degree ofhomogeneity in the group being stud-ied. Where there is little uniformityof opinion in the group, more inter-views are necessary to achieve a At the right are shown steps in tab-ulating attitude survey results. Topto bottom: editing and codingquestionnaires; punching responses toquestions on tabulating cards; sortingpunched cards and counting responses
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11 Bell Telephone Magazine SPRING given degree of accuracy than wherepeoples opinions tend to be similar. Getting the Information There are various ways of obtain-ing attitude information from thepublic. Each has its advantages anddisadvantages, and the procedureused for any specific survey would bethe one which would provide themost reliable and useful results inconnection with the problem at hand. Face-to-Face Interviews have beenused in conducting many Bell Systemsurveys. While this method is rela-tively time-consuming, it has particu-lar advantages where a new problemis being explored, where many ques-tions are to be asked, where the ques-tions are on subjects unfamiliar to thecustomer, or where it is necessarythat the questions be answered in defi-nite order. Face-to-face interviews must bemade, of course, where observationof the premises is necessary to getdata on economic status or to observetelephone facilities; or where, as apart of an interview, it is desired toshow advertis

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