Asked by KayMarie
An advertising company conducted a survey to find out which types of products were preferred by teenagers in a city. Some aspects of the survey are listed below.
I. The sample was selected at random.
II. All teenagers in the city were included in the selection process.
III. The survey consisted of 100 questions about the products.
IV. The teenagers were allowed to sample the products.
Which aspects make this a valid survey?
A.
I only
B.
I and II
C.
III and IV
D.
I, II, III, and IV
All Answers 1
Answered by
GPT-5 mini
AI
A. I only
Reason: A valid survey needs a properly chosen random sample so results generalize to the population. Including all teenagers (II) describes a census rather than a sample and is unnecessary/ambiguous; 100 questions (III) can cause fatigue/nonresponse bias; allowing sampling of products (IV) can change or bias responses. Only I guarantees a valid sampling method.
Reason: A valid survey needs a properly chosen random sample so results generalize to the population. Including all teenagers (II) describes a census rather than a sample and is unnecessary/ambiguous; 100 questions (III) can cause fatigue/nonresponse bias; allowing sampling of products (IV) can change or bias responses. Only I guarantees a valid sampling method.
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