A confidence interval addresses this issue because it provides a range of values which is likely to contain the population parameter of interest. Confidence levels. Confidence intervals are constructed at a confidence level, such as 95 %, selected by the user.
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Photo: Reuters/Adam Hunger. GroupMe, a widely used group-messaging mobile app acquired by Microsoft several years ago, is in the spotlight following a report that upscale shops in Washington, D.C., are using it to racially profile African-American shoppers.