Expressing Confidence Intervals Example 2 showed how the statistics of n = 22 and s = 14.3 result in this 95% confidence interval estimate of s: 11.0 6 s 6 20.4. That confidence interval can also be expressed as (11.0, 20.4), but it cannot be expressed as 15.7 { 4.7.

Given that 15.7 { 4.7 results in values of 11.0 and 20.4, why is it wrong to express the confidence interval as 15.7 { 4.7?