Aclinical trial tests a method designed to increase the probability of conceiving a girl. in the study 580 babies were born, and 319 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 <

does the method appear to be effective?

0.4967<p<0.6033

Not effective

Step-by-step explanation:

given that a  clinical trial tests a method designed to increase the probability of conceiving a girl.

In the study 580 babies were born, and 319 of them were girls

Sample proportion p=

Standard error of proportion p =

Margin of error for 99%= Z critical * std error=

(Since sample size is large Z value is used)

Confidence interval 99%

=

0.4967<p<0.6033

This method appears to be not effective as the confidence interval 99% contains 0.50 indicating probability for girls is still 0.50