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 IIa: mothers had chosen but were unable to provide breast milk; and Group IIb: 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 test statistic:

Find the P-value:

Having a hard time figuring how to plug in this problem on stat crunch.

Group

nj

xj

sj

l

93

95.4

10.6

lla

16

93.4

21.9

llb

191

106.5

15.1

 

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