At a certain university, students who live in the dormitories eat at a common dining hall. Recently, come students have been complaining about the quality of the food served there. The dining hall manager decided to do a survey to estimate the proportion of students living in the dormitories who think that the quality of the food should be improved. One evening, the manager asked the first 100 students entering the dining hall to answer the following question. Survey Question Many students believe that the food served in the dining hall needs improvement. Do you think that the quality of food served here needs improvement, even though that would increase the cost of the meal plan? ____Yes     ____No     ____No opinion   In the following setting, explain what type of sampling technique was used and how bias may have been introduced based on the way the sample was selected. Then: Suggest how the sample could have been selected differently to avoid that bias. Suggest how it could have been worded differently to avoid any wording bias. Create your own survey question! Make sure to discuss the method in which you would collect your sample and how you propose to avoid bias.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Scenario 1: Survey Questions & Bias

At a certain university, students who live in the dormitories eat at a common dining hall. Recently, come students have been complaining about the quality of the food served there. The dining hall manager decided to do a survey to estimate the proportion of students living in the dormitories who think that the quality of the food should be improved. One evening, the manager asked the first 100 students entering the dining hall to answer the following question.

Survey Question

Many students believe that the food served in the dining hall needs improvement. Do you think that the quality of food served here needs improvement, even though that would increase the cost of the meal plan?

____Yes     ____No     ____No opinion

 

  1. In the following setting, explain what type of sampling technique was used and how bias may have been introduced based on the way the sample was selected. Then:
    • Suggest how the sample could have been selected differently to avoid that bias.
    • Suggest how it could have been worded differently to avoid any wording bias.
  2. Create your own survey question! Make sure to discuss the method in which you would collect your sample and how you propose to avoid bias. 
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