A study addressed the issue of whether women have the ability to predict the sex of their

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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.


Use the sign test for the claim involving nominal data.

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Elementary Statistics

ISBN: 9780321500243

11th Edition

Authors: Mario F. Triola

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