Data

Method

95% confidence interval

Original

Central Limit Theorem

(9.3, 28.5)

Original

Bootstrap (B = 5000)

(10.1, 28.3)

Log-transformed

Back-transformation

(5.0, 24.4)

Log-transformed

Wald

(9.3, 54.4)

Log-transformed

Third order

(11.1, 123.9)

Square root transformed

Back-transformation

(6.7, 26.9)

Square root transformed

Wald

(9.8, 28.0)

Square root transformed

Third order

(11.1, 31.7)