module 2 dq 1 argument Rachael A convenience sample is a sample that is obtained by the most…

module 2 dq 1 argument Rachael A convenience sample is a sample that is obtained by the most…

module 2 dq 1 argument Rachael

A convenience sample is a sample that is obtained by the most expedient or convenient method. There are several limitations associated with research based upon a convenience sample. First, the sample obtained may not be representative of the population under study. Consequently, the ability to generalize the findings from the study are limited (Costanza, Blacksmith, & Coats, 2015). In other words, a convenience sample limits the external validity of the study. Second, it is possible the convenience sample contains individuals with high similarities regarding the variable or phenomena of interest, thus incorporating undesired bias in the results. As a result, the amount of variation in the data is limited making it difficult to obtain conclusive results.

Let me provide you with a real example that I observed from a fellow student in a beginning statistics course many years ago. At this point in time, there were two pizza establishments – Pizza Hut and Domino’s Pizza – in the small college town. This particular Pizza Hut franchise did not deliver pizza and only offered dine-in or carry-out. Thus, the Pizza Hut primarily catered to the town’s residents and not the college students as most of them did not have their own transportation and the restaurant was about 2miles from campus. On the other hand, the Domino’s Pizza franchise only offered delivery or carry-out. Thus, a large portion of the Dominoes’ business was from college students. This particular student, I’ll call her Mary for simplicity (I actually do not remember her name), worked for Pizza Hut and wanted the manager to begin offering pizza delivery.

The introductory statistics class we were in required students to create a small research study and write up a report that included a research question, hypotheses, and inferences from the results. Mary chose to collect a convenience sample by asking Pizza Hut patrons, “If we (meaning Pizza Hut) were to begin offering pizza delivery would you order from us?” Notice, that Mary only sampled individuals who were already patrons of Pizza Hut, and who were obviously willing to drive to Pizza Hut for their pizza. The results were overwhelmingly in the affirmative. However, by only sampling Pizza Hut patrons the patrons of Domino’s pizza were excluded, creating a sample and results that did not necessarily represent the population of that small town. Despite these limitations, the manager of the Pizza Hut did begin to offer pizza delivery, and by the time I graduated from that college the Domino’s franchise closed.

module 2 dq 1 argument Rachael A convenience sample is a sample that is obtained by the most…

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