to support try Claim.. 2.) An article describes a study of 1,000 males with pierced tongues. Suppose that it is reasonable to regard this sample as a random sample from the population of all males with pierced tongues. The researchers found receding gums, which can lead to tooth loss, in 520 of the study participants. Construct a 99% confidence interval for the proportion of males with pierced tongues who have receding gums. n =1 1000 df = 1959 D = 570 6 52 9 2 100657 (1-652)