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(6) 1.729 (a) 4301 7. How would the margin of error of a confidence interval for a population mean change if you increase the
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Answer #1

We know that,

Keeping the same level of confidence, As sample size increases then margin of error decreases and viceversa because margin of error is inversely proportional to the squareroot of sample size.

Hence,

Option c. is the correct.

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