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Use a 0.05 significance level to test the claim that IQ scores of people with low...

Use a 0.05 significance level to test the claim that IQ scores of people with low lead levels vary more than IQ scores of people with high lead levels. Use the following statistics:

Low Lead Level: n=78, x=92.88462, s=15.34451

High Lead Level: n=21, x=86,90476, s=8.988352

a)Write down the claim

b) Write down the null hypothesis and the alternative hypothesis. Indicate which one is the claim.

c) Draw the probability distribution curve. Write down the testing statistic and the P-Value on the graph.

d) Determine whether to reject the null hypothesis. Write the conclusion in a complete sentence.

Math   Statistics-And-Probability   
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