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Refer to Exercise 12.111. The authors also wanted to test whether women with different levels of education would differ in their ability to guess the sex of their babies correctly. Of the n = 45 women with more than 12 years of education, 32 guessed correctly. Of the n = 57 women with 12 or fewer years of education, 24 guessed correctly. (Two women did not report their level of education.) Is there sufficient evidence to conclude that women in the populations with these two different levels of education differ in their ability to guess the sex of their baby? Carry out the test using a 5 .05, and make sure to state a conclusion.
Exercise 12.111
Perry et al. (1999) wanted to test the folklore that women who have not been given information about the sex of their unborn child can guess it at better than chance levels. They asked a sample of 104 pregnant women to guess the sex of their babies, and 57 guessed correctly. Assuming chance guessing would result in 50% correct guesses, test the hypothesis that women can guess at a better than chance level. Carry out the test using a = .05, and make sure to state a conclusion.
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