Question: Assuming the population standard deviation sigma () is known, if the sample size were increased from n to 4*n (sample size increases by a factor

Assuming the population standard deviation sigma () is known, if the sample size were increased from n to 4*n (sample size increases by a factor of 4), then the width of the confidence interval would decrease by a factor of one-quarter, i.e., be 25% as wide.

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