If the Standard Deviation of the Lifetime of a Vacuum

question 119

Short Answer

If the standard deviation of the lifetime of a vacuum cleaner is estimated to be 300 hours, how large of a sample must be taken in order to be 97% confident that the margin of error will not exceed 40 hours?

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Definitions:

Client Reaction

The response or feedback given by clients or participants in response to a product, service, or intervention.

Analogue Methodology

A research method that uses analogous situations or simulations to study psychological phenomena or treatments in a controlled environment.

Ethical Obstacles

Challenges or issues in research that arise from moral concerns or considerations, often related to the treatment of research participants.

Analogue Methodology

A research approach that simulates real-world conditions in a controlled environment to study behavioral processes or psychological phenomena.