Sleep apnea: 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 424 people aged 65 and over, 118 of them had sleep apnea. In another study, medical researchers concluded that more than 13% of the elderly people have apnea. Based on the confidence interval, does it appear that more than 13% of people aged 65 and over have sleep apnea?