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Solved: Use the sign test for the claim involving nominal
Chapter 13, Problem 14BSC(choose chapter or problem)
Use the sign test for the claim involving nominal data. Predicting Sex of JBaby? A study addressed the issue of whether women have the ability to predict the sex of their babies. Among 104 recruited subjects, 55% correctly guessed the sex of the baby (based on data from “Are Women Carrying ‘Basketballs’ Really Having Boys? Testing Pregnancy Folklore,” by Perry, DiPietro, and Constigan, ?Birth,? Vol. 26, No. 3). Use a 0.05 significance level to test the claim that women do not have the ability to predict the sex of their babies.
Questions & Answers
QUESTION:
Use the sign test for the claim involving nominal data. Predicting Sex of JBaby? A study addressed the issue of whether women have the ability to predict the sex of their babies. Among 104 recruited subjects, 55% correctly guessed the sex of the baby (based on data from “Are Women Carrying ‘Basketballs’ Really Having Boys? Testing Pregnancy Folklore,” by Perry, DiPietro, and Constigan, ?Birth,? Vol. 26, No. 3). Use a 0.05 significance level to test the claim that women do not have the ability to predict the sex of their babies.
ANSWER:Solution 14BSC Step 1 Given, the issue of whether women have the ability to predict the sex of their babies. Here among 104 recruited subjects, 55% correctly guessed the sex of the baby. By using = 0.05 level of significance to test the claim that women do not have the ability to predict the sex of their babies. We need to check the requirements for applying sign test The sample is collected according to simple random sampling. Let us denote negative sign (-) for women were unsuccessful in predicting sex and positive sign (+) for women were successful in predicting sex,