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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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Use the sign test for the claim involving nominal data.

Chapter 13, Problem 13BSC

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QUESTION:

Use the sign test for the claim involving nominal data. Gender Selection? The Genetics and IVE Institute conducted a clinical trial of its methods for gender selection. As of this writing, 239 of 291 babies born to parents using the YSORT method were boys. Use a 0.01 significance level to test the claim that the YSORT method has no effect.

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QUESTION:

Use the sign test for the claim involving nominal data. Gender Selection? The Genetics and IVE Institute conducted a clinical trial of its methods for gender selection. As of this writing, 239 of 291 babies born to parents using the YSORT method were boys. Use a 0.01 significance level to test the claim that the YSORT method has no effect.

ANSWER:

Solution 13BSC Step 1 Let us denote ‘p’ as the proportion of boys i.e., Proportion of boys (p) = 1 = 0.5. 2 By using = 0.01 level of significance to test the claim that the YSORT method has no effect since 239 of 291 babies born to parents using the YSORT method were boys i.e., p > 0.5. The Hypotheses can be expressed as H0 p = 0.5 (proportion of boys = 0.5) H1 p > 0.5 (more babies babies born to parents using the YSORT method were boys)

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