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b. Construct a confidence interval suitable for testing the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. 口-口

b. Construct a confidence interval suitable for testing the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. 口-口

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete E Click the icon to view the data table of IQ scores. IQ scores OA. Ho: H1#H2 H: H1> H2 O B. Ho: H1 = H2 H: H1 #H2 Medium Lead Level High Lead Leve 72 n2 = 11 96 C. Ho: H1 SH2 D. Ho: H1 H2 H: Hy >H2 92 X2 = 89.003 85 84 82 = 9.752 97 The test statistic is 0.41. (Round to two decimal places as needed.) 83 92 95 111 The P-value is 0.343. (Round to three decimal places as needed.) State the conclusion for the test. 91 OA. Reject the null hypothesis. There is sufficient evidence to support the claim that subjects with medium lead levels have higher IQ scores. O B. Fail to reject the null hypothesis. There is sufficient evidence to support the claim that subjects with medium lead levels have higher 1Q scores. OC. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that subjects with medium lead levels have higher IQ scores. Print Done O D. Reject the null hypothesis. There is not sufficient evidence to support the claim that subjects with medium lead levels have higher IQ scores. b. Construct a confidence interval suitable for testing the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. (Round to two decimal places as needed.)
Transcribed Image Text:Listed in the data table are IQ scores for a random sample of subjects with medium lead levels in their blood. Also listed are statistics from a study done of IQ scores for a random sample of subjects with high lead levels. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Complete E Click the icon to view the data table of IQ scores. IQ scores OA. Ho: H1#H2 H: H1> H2 O B. Ho: H1 = H2 H: H1 #H2 Medium Lead Level High Lead Leve 72 n2 = 11 96 C. Ho: H1 SH2 D. Ho: H1 H2 H: Hy >H2 92 X2 = 89.003 85 84 82 = 9.752 97 The test statistic is 0.41. (Round to two decimal places as needed.) 83 92 95 111 The P-value is 0.343. (Round to three decimal places as needed.) State the conclusion for the test. 91 OA. Reject the null hypothesis. There is sufficient evidence to support the claim that subjects with medium lead levels have higher IQ scores. O B. Fail to reject the null hypothesis. There is sufficient evidence to support the claim that subjects with medium lead levels have higher 1Q scores. OC. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that subjects with medium lead levels have higher IQ scores. Print Done O D. Reject the null hypothesis. There is not sufficient evidence to support the claim that subjects with medium lead levels have higher IQ scores. b. Construct a confidence interval suitable for testing the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. (Round to two decimal places as needed.)
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