A clinical trial tests a method designed to increase the probability of conceiving a girl. in the study 340 babies were born, and 289 of them were girls. use the sample data to construct a 99%...

A clinical trial tests a method designed to increase the probability of conceiving a girl. in the study 340 babies were born, and 289 of them were girls. use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. based on the results does the method appear to be effective?