B. A population has not been identified.
This question does not specify the group of people for whom the relationship between the number of dreams a night and the quality of sleep is being examined. Without a defined population, the question lacks focus and precision, making it ineffective for statistical analysis.
Why is the following an ineffective statistical question?
Does the number of dreams a night affect the quality of sleep?
A. Data cannot be collected to answer the question.
B. A population has not been identified.
C. The answer to the statistical question is not worth pursuing.
D. Information about the variables of interest is not available.
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