Listed below are the lead concentrations in pg/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 18 pg/g. Assume that the sample is a simple random sample. 19.5 8.5 17 20.5 19.5 4 16.5 20.5 10.5 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? O A. Ho >18 ug/g H,p< 18 ug/g ΟΒ H, με 18 μg H p> 18 pg/g C. Ho= 18 ug/g H, p< 18 ug/g OD H, μ= 18 μg H, ut 18 ug/g Determine the test statistic. (Round to two decimal places as needed.)

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Listed below are the lead concentrations in µg/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such
medicines is less than 18 µg/g. Assume that the sample is a simple random sample.
19.5 8.5 17 20.5
19.5
4
16.5
20.5
10.5
Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses?
O A. Ho > 18 ug/g
H,p< 18 µg/g
O B. Ho: u= 18 µg/g
H u> 18 µg/g
C. Ho:u= 18 ug/g
O D. Ho: u= 18 µug/g
H,: µt 18 µg/g
H, u< 18 ug/g
Determine the test statistic,
(Round to two decimal places as needed.)
Transcribed Image Text:Listed below are the lead concentrations in µg/g measured in different traditional medicines. Use a 0.10 significance level to test the claim that the mean lead concentration for all such medicines is less than 18 µg/g. Assume that the sample is a simple random sample. 19.5 8.5 17 20.5 19.5 4 16.5 20.5 10.5 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? O A. Ho > 18 ug/g H,p< 18 µg/g O B. Ho: u= 18 µg/g H u> 18 µg/g C. Ho:u= 18 ug/g O D. Ho: u= 18 µug/g H,: µt 18 µg/g H, u< 18 ug/g Determine the test statistic, (Round to two decimal places as needed.)
In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes
(before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.7 and a standard deviation of 2.37. Use a 0.05 significance level to test the claim that with garlic
treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatrnent? Assume that a simple random sample has
been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.
What are the null and alternative hypotheses?
O A. Ho: u>0 mg/dL
H,:u<0 mg/dL
B. Ho: µ=0 mg/dL
H,: u>0 mg/dL
O C. Ho: µ= 0 mg/dL
H,: µ#0 mg/dL
O D. Ho: µ=0 mg/dL.
H,iµ<0 mg/dL
Determine the test statistic.
(Round to two decimal places as needed.)
Transcribed Image Text:In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of 0.7 and a standard deviation of 2.37. Use a 0.05 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatrnent? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? O A. Ho: u>0 mg/dL H,:u<0 mg/dL B. Ho: µ=0 mg/dL H,: u>0 mg/dL O C. Ho: µ= 0 mg/dL H,: µ#0 mg/dL O D. Ho: µ=0 mg/dL. H,iµ<0 mg/dL Determine the test statistic. (Round to two decimal places as needed.)
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