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Researchers analyzed IQ data on preterm children at age 7-8 years. The mothers of the children in the study had chosen whether to provide their infants with breast milk within 72 hours of delivery. The researchers used the following designations. Group I: mothers declined to provide breast milk; Group lla: mothers had chosen but were unable to Grace provide breast milk and Group llb: mothers had chosen and were able to provide breast milk. The summary statistics on IQ are at the right. At the 10% significance level, do the data provide sufficient evidence to conclude that a difference exists in mean IQ at age 7-8 years for preterm children among the three groups? Critical values are given at the right Group Find the null and alternative hypotheses. Choose the correct answer below. OA M₂: OC. H: Not all the means are equal. M₂: "PP Find the test statistic (Round to two decimal places as needed.) Find the critical value (Round to two decimal places as needed.) Draw a conclusion H. At the 10% significance level, the data provide evidence to conclude that OB. H₂H S H₂HP P OD. H₂HP exists in mean 10 at age 7-8 years for preterm children among the three groups. H.: Not all the means are equal = 3 86 200 " 5 99.9 92.5 12.7 19.5 132 104.8 13.2 0.10 0.05 0.025 0.01 0.00 Fa 2.32 3.03 3.74 4.68 5.39

Researchers analyzed IQ data on preterm children at age 7-8 years. The mothers of the children in the study had chosen whether to provide their infants with breast milk within 72 hours of delivery. The researchers used the following designations. Group I: mothers declined to provide breast milk; Group lla: mothers had chosen but were unable to Grace provide breast milk and Group llb: mothers had chosen and were able to provide breast milk. The summary statistics on IQ are at the right. At the 10% significance level, do the data provide sufficient evidence to conclude that a difference exists in mean IQ at age 7-8 years for preterm children among the three groups? Critical values are given at the right Group Find the null and alternative hypotheses. Choose the correct answer below. OA M₂: OC. H: Not all the means are equal. M₂: "PP Find the test statistic (Round to two decimal places as needed.) Find the critical value (Round to two decimal places as needed.) Draw a conclusion H. At the 10% significance level, the data provide evidence to conclude that OB. H₂H S H₂HP P OD. H₂HP exists in mean 10 at age 7-8 years for preterm children among the three groups. H.: Not all the means are equal = 3 86 200 " 5 99.9 92.5 12.7 19.5 132 104.8 13.2 0.10 0.05 0.025 0.01 0.00 Fa 2.32 3.03 3.74 4.68 5.39

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
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Researchers analyzed IQ data on preterm children at age 7-8 years. The mothers of the children in the study had chosen whether to provide their infants with breast milk within 72 hours of delivery. The researchers used the following designations. Group I: mothers declined to provide breast milk; Group Ila: mothers had chosen but were unable to provide breast milk; and Group Ilb: mothers had chosen and were able to provide breast milk. The summary statistics on IQ are at the right. At the 10% significance level, do the data provide sufficient evidence to conclude that a difference exists in mean IQ at age 7-8 years for preterm children among the three groups? Critical values are given at the right. Find the null and alternative hypotheses. Choose the correct answer below. OA. Ho: la Hilb Ha: P <Pila<Hilb OC. Ho: Not all the means are equal. H₂: PPaPilb Find the test statistic. F= (Round to two decimal places as needed.) Find the critical value. (Round to two decimal places as needed.) Draw a conclusion. Ho. At the 10% significance level, the data provide evidence to conclude that OB. Ho-Hila Pilb Ha: Pi>Hila > Hilb OD. Ho: Pila Pil ▼ exists in mean IQ at age 7-8 years for preterm children among the three groups. H: Not all the means are equal. Group T Ila llb nj 14 200 xj 99.9 92.5 104.8 S₁ 12.2 19.5 13.2 a 0.10 0.05 0.025 0.01 0.005 Fa 2.32 3.03 3.74 4.68 5.39
Transcribed Image Text:Researchers analyzed IQ data on preterm children at age 7-8 years. The mothers of the children in the study had chosen whether to provide their infants with breast milk within 72 hours of delivery. The researchers used the following designations. Group I: mothers declined to provide breast milk; Group Ila: mothers had chosen but were unable to provide breast milk; and Group Ilb: mothers had chosen and were able to provide breast milk. The summary statistics on IQ are at the right. At the 10% significance level, do the data provide sufficient evidence to conclude that a difference exists in mean IQ at age 7-8 years for preterm children among the three groups? Critical values are given at the right. Find the null and alternative hypotheses. Choose the correct answer below. OA. Ho: la Hilb Ha: P <Pila<Hilb OC. Ho: Not all the means are equal. H₂: PPaPilb Find the test statistic. F= (Round to two decimal places as needed.) Find the critical value. (Round to two decimal places as needed.) Draw a conclusion. Ho. At the 10% significance level, the data provide evidence to conclude that OB. Ho-Hila Pilb Ha: Pi>Hila > Hilb OD. Ho: Pila Pil ▼ exists in mean IQ at age 7-8 years for preterm children among the three groups. H: Not all the means are equal. Group T Ila llb nj 14 200 xj 99.9 92.5 104.8 S₁ 12.2 19.5 13.2 a 0.10 0.05 0.025 0.01 0.005 Fa 2.32 3.03 3.74 4.68 5.39
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