document.write( "Question 1192648: Suppose you compute a confidence interval with a sample size of 30. What will happen to the confidence interval if the sample size increases to 85?\r
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\n" ); document.write( "\n" ); document.write( "A) The confidence level will decrease, making the confidence interval smaller.\r
\n" ); document.write( "\n" ); document.write( "B) The confidence level will increase, making the confidence interval larger.\r
\n" ); document.write( "\n" ); document.write( "C)The margin of error will increase, making the confidence interval larger.\r
\n" ); document.write( "\n" ); document.write( "D) The margin of error will decrease, making the confidence interval smaller. \n" ); document.write( "

Algebra.Com's Answer #824558 by Boreal(15235) $\"\"$ $\"About$

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The confidence interval will narrow as the sample size gets greater. But A says a decreasing confidence makes for a smaller interval. That in of itself is true, but the confidence level doesn't change with a larger sample size; the confidence interval does.
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\n" ); document.write( "The answer is D. The margin of error gets smaller, because n is in the denominator and is getting larger even as everything else stays the same. With a smaller margin of error, there is a smaller confidence interval. \n" ); document.write( "

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