A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 688 babies wereborn, and 344 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on theresult, does the method appear to beeffective?

___< p<____ (Round to three decimal places asneeded.)

Does the method appear to beeffective?

a. No, the proportion of girls isnot significantly different from 0.5.

b. Yes, the proportion of girls is significantly different from 0.5.