Data previously obtained, lists full IQ scores from a random sample of subjects with low lead levels in their blood and another random sample of subjects with high lead levels in their blood. The statistics are listed below. Use a 0.05 significance level to test the claim that the mean IQ score of people with low blood lead levels is higher than the mean IQ score of people with high blood lead levels. Low Blood Lead Level High Blood Lead Level n1 = 78 n2 = 21 = 92.88462 X2 = 86.90476 S1 = 15.34451 S2 = 8.988352

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Data previously obtained, lists full IQ scores from a random sample of subjects with low lead
levels in their blood and another random sample of subjects with high lead levels in their blood. The statistics are listed
below. Use a 0.05 significance level to test the claim that the mean IQ score of people with low blood lead levels is
higher than the mean IQ score of people with high blood lead levels.
Low Blood Lead Level
High Blood Lead Level
n1 = 78
n2 = 21
X1
= 92.88462
X2
= 86.90476
S1 = 15.34451
S2 = 8.988352
State the claim:
State the claim in symbols
Null and Alternative hypotheses:
What type tail test?
Test Statistic:
Critical Value Graph:
Critical Value(s):
Decision:
Final Conclusion:
Transcribed Image Text:Data previously obtained, lists full IQ scores from a random sample of subjects with low lead levels in their blood and another random sample of subjects with high lead levels in their blood. The statistics are listed below. Use a 0.05 significance level to test the claim that the mean IQ score of people with low blood lead levels is higher than the mean IQ score of people with high blood lead levels. Low Blood Lead Level High Blood Lead Level n1 = 78 n2 = 21 X1 = 92.88462 X2 = 86.90476 S1 = 15.34451 S2 = 8.988352 State the claim: State the claim in symbols Null and Alternative hypotheses: What type tail test? Test Statistic: Critical Value Graph: Critical Value(s): Decision: Final Conclusion:
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