Question

M17 Problem Set Score: 7.24/38 7/22 answered Question 11 An institute conducted a clinical trial of its methods for gender selection. The results showed that 342 of 627 babies born to parents using a specific gender-selection method were boys. Use the sign test and a 0.01 significance level to test the claim that the method increased the likelihood of having a boy. Find the null and alternative hypothesis. H: Op *0.5 Op=0.5 Op < 0.5 Op > 0.5 H: p <0.5 p=0.5 Op 0.5 Op > 0.5 If we consider to represent a boy, then how many of each sign is there?

Answer 1

bolutim; 342 aze boys. Out of 627 babies null born , is hypothesis The = 0.5 Hoop is allernative hypothesis The then boys + 285 : 627 Đt: P 2015- If is used to represent Number of Positive signs : 342 Number of Negative erans: Total Number of signs sind the p-value, large, need to is To AR statis tie. compute? the sample size Normality of the population. ginen by the tesp assume is statistie The test undar to, ~ Nood þ- po Poline (under Ho Where po 0.55 is 0.55 -0.5 Then T = 2.5 0.5 XD:5 627 -value Then par PCT >2,5) = 0.0062 As the significance level (a) = 001, 2 L p-value Ho. so 0 е reject the an Thus the reject Ho basis of al 1% Level institute's claim ginen I significance data, and find that the accepted.