Aclinical trial tests a method designed to increase the probability of conceiving a girl. In the study 400 babies were born, and 320 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born. Based on the result, does the method appear to be effective?

____< p <____ (Round to three decimal places as needed.)

Does the method appear to be effective?

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

OR

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

(Please show all work)