I collect a random sample of size n from a population and from the data collected I compute a 95% confidence interval for the mean of the population. Which of the following would produce a new confidence interval with larger width (larger margin of error) based on the same data set?

Question

Accepted Answer

Use a larger confidence level.

Answer

Use the same confidence level, but compute the interval n times. Approximately 5% of these intervals will be larger.

Answer

Use a smaller confidence level.

Answer

Nothing can guarantee absolutely that you will get a larger interval. One can only say the chance of obtaining a larger interval is 0.05.

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I collect a random sample of size n from a population and from the data collecte...

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