A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 405 babies were​ born, and of them were girls. Use the sample data to construct a ​% confidence interval estimate of the percentage of girls born. Based on the​ result, does the method appear to be​ effective? nothing p nothing ​(Round to three decimal places as​ needed.) Does the method appear to be​ effective? ​, the proportion of girls significantly different from 0.5. ​, the proportion of girls significantly different from 0.5.