Justify the conclusion

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Reference no: EM1321038

Question: Given below is the STATA output looking at the overall differences between three categories of lead exposure and the mean IQ for children.  The exposure groups are defined as:  1 = control group, 2 = currently exposed & 3 = previously exposed. 

Analysis of variance

source

ss

df

MS

F

Prob>F

Between groups

1600.097

2

800.048437

4.05

0.0199

Within groups

23919.1

121

197.678485

 

 

Total

25519.19

123

207.473118

 

 

Bartlett's test for equal variances : chi2(2) = 7.4930 Prob > chi2 = 0.024
Comparison of full scale iq by exposure group ( bonferroni)

Row mean- col Mean

1

2

2

-0.64189

 

1

 

3

8.64657

9.28846

0.024

0.064

[A] Justify the conclusion by describing the relevant information from the output.
[B] What do you conclude about the IQ of children and their exposure status?

Reference no: EM1321038

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