A clinical trial tests a method designed to increase the probability of conceivi

Question

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 652 babies were born, and 326 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? _____ _____ (Round to three decimal places as needed.) Does the method appear to be effective? No, the proportion of girls is not significantly different from 0.5. Yes, the proportion of girls is significantly different from 0.5.

Explanation / Answer

Sample Proportion = 326/652 = 0.5

Margin of error = 2.5758*Sqrt(0.5*0.5/652) = 0.050439

99% Interval

(0.5-0.050439, 0.5+0.050439)

= 0.450<p<0.550

b) No, It is not significantly different from 0.5

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