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
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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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