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Why is the following an ineffective statistical question?

Does the number of dreams a night affect the quality of sleep?

(1 point)
Responses

The answer to the statistical question is not worth pursuing.

Information about the variables of interest is not available.

Data cannot be collected to answer the question.

A population has not been identified.

This is an ineffective statistical question because it is not clear how the number of dreams and the quality of sleep would be measured. There may be subjective interpretations of both variables that could lead to unreliable data. Additionally, the question does not specify a population or sample from which data would be collected. Without clear definitions and procedures for measuring the variables, it would be difficult to collect meaningful data to answer the question.