![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Statement : Increasing the standard deviation will expand a confidence interval.
\The statement is true.
\Reasoning :
\An Increase in the standard deviation will increase the maximum error of estimate and will
\expand the confidence interval.
\Therefore as the standard deviation increases the confidence interval expands.
\![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The statement is true.