6.34 Prenatal vitamins and Autism: Researchers studying the link between prenatal vitamin use and autism surveyed the mothers of a random sample of children aged 24 - 60 months with autism and conducted another separate random sample for children with typical development. The table below shows the number of mothers in each group who did and did not use prenatal vitamins during the three months before pregnancy (periconceptional period). (Schmidt, 2011) Autism Typical Development Total No vitamin 111 70 181 Vitamin 143 159 302 Total 254 229 483 (a) State appropriate hypotheses to test for independence of use of prenatal vitamins during the three months before pregnancy and autism. Ho: pvitamin = pno vitamin Ha: pvitamin < pno vitamin Ho: pvitamin = pno vitamin Ha: pvitamin ≠ pno vitamin Ho: pvitamin = pno vitamin Ha: pvitamin > pno vitamin (b) Complete the hypothesis test and state an appropriate conclusion. What is the value of the test statistic for this test? ___ What is the p-value associated with this test? .The result of the hypothesis is:_ Since p ≥ α we accept the null hypothesis Since p ≥ α we do not have enough evidence to reject the null hypothesis Since p<α we reject the null hypothesis and accept the alternative Since p<α we fail to reject the null hypothesis Since p ≥ α we reject the null hypothesis and accept the alternative

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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6.34 Prenatal vitamins and Autism: Researchers studying the link between prenatal vitamin use and autism surveyed the mothers of a random sample of children aged 24 - 60 months with autism and conducted another separate random sample for children with typical development. The table below shows the number of mothers in each group who did and did not use prenatal vitamins during the three months before pregnancy (periconceptional period). (Schmidt, 2011)

	Autism	Typical Development	Total
No vitamin	111	70	181
Vitamin	143	159	302
Total	254	229	483

(a) State appropriate hypotheses to test for independence of use of prenatal vitamins during the three months before pregnancy and autism.

Ho: p_vitamin = p_{no vitamin}
Ha: p_vitamin < p_{no vitamin}
Ho: p_vitamin = p_{no vitamin}
Ha: p_vitamin ≠ p_{no vitamin}
Ho: p_vitamin = p_{no vitamin}
Ha: p_vitamin > p_{no vitamin}

(b) Complete the hypothesis test and state an appropriate conclusion.
What is the value of the test statistic for this test? _______ What is the p-value associated with this test?________ .The result of the hypothesis is:_____