We Have Calculated a Confidence Interval Based on a Sample

question 40

Multiple Choice

We have calculated a confidence interval based on a sample of n = 180. Now we want to get a better estimate with a margin of error only one third as large. We need a new sample with n at least…

• A) 540
• B) 20
• C) 60
• D) 1620
• E) 312

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Definitions:

Flat Tire

A deflated or punctured tire that prevents a vehicle from being driven efficiently, often requiring repair or replacement.

Laundry Basket

A laundry basket is a container, often made of plastic, wicker, or cloth, used to hold clothes that need to be washed or have just been laundered.

Dirty Clothes

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Catharsis Hypothesis

The idea that expressing or releasing strong emotions, such as anger or frustration, can relieve psychological tension and lead to emotional restoration.