Question

A clinical trial was conducted using a new method designed to increase the probability of conceiving a boy. As of this​ writing,

278

babies were born to parents using the new​ method, and

252

of them were boys. Use a

0.05

significance level to test the claim that the new method is effective in increasing the likelihood that a baby will be a boy. Identify the null​ hypothesis, alternative​ hypothesis, test​ statistic, P-value, conclusion about the null​ hypothesis, and final conclusion that addresses the original claim. Use the​ P-value method and the normal distribution as an approximation to the binomial distribution.

Answer 1

If the new method is effective in increasing the likelihood that a baby will be a boy the proportion of baby must be greater than 0.50.

Conclusion: There is evidence to support the claim that the new method is effective in increasing the likelihood that a baby will be a boy.