a travel agency contacted a department store ...
a travel agency contacted a department store and obtained the list of all people who made purchases using their credit cards at the store in the last month. the agency then surveyed a random sample from the list, calling them to ask their preference for air travel or train travel for taking holidays. which of the following types of bias affects the conclusions of the survey? selection bias response bias non - response bias deliberate bias
Answer
# Brief Explanations:
The sample is only from people who made credit - card purchases at a department store in the last month. This group may not be representative of the general population in terms of travel preferences. Selection bias occurs when the method of selecting the sample leads to a non - representative sample. There is no indication of response bias (how respondents answer), non - response bias (people not responding), or deliberate bias (intentional manipulation).
# Answer:
A. Selection bias