Sleep apnea is a disorder in which there are pauses in breathing during sleep. People with this condition must wake up frequently to breathe. In a sample of 432 people aged 65 and over, 108 of them had sleep apnea.

Given the point estimate for the population portion of those aged 65 and over who have sleep apnea is 0.25

**Construct a 99% confidence interval for the proportion of those aged 65 and over who have sleep apnea. Round three decimal places.