Question

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 380 babies were bom, and 342 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls bom. Based on the result, does the method appear to be effective? <p (Round to three decimal places as needed)

Answer 1

Answer: In this n = 380 x=342 Point estimate - sample poportion = Ⓡ = x 342 -0.9 380-07 8 = 0.9 á Si- Ñ FI-0.9 -0.1 asi- GP7 At 99% confidence interval L 1-099 50.01 J Cortical value zone = 0 - 70.005 = 2.576 mangin of Error = E=2*l pa ac 120.9300:1) 380 20.039 proportion is population internal for A 997. confidence PE CPCPTE 0.4-0.039 LPL0.9 +0.039 0.861 <P C 10.939