STATISTICS
posted by Susie .
Which of the following would increase the width of a confidence interval?
Changing from a 99% to 95% confidence level.
Increasing the variability of the outcome.
Increasing the sample size.
Removing an outlier from the data

If you don't know the right alternative, possibly you could find it by eliminating the false alternatives.
Increased variability 
Increasing the variability of the outcome.
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