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X. IQ Scores Medium Lead Level O High Lead Level 72 n2 11 84 92 X2% D 88.555 85 87 S2 = 10.083 %3D 97 83 92 101 111 91 Print Done

X. IQ Scores Medium Lead Level O High Lead Level 72 n2 11 84 92 X2% D 88.555 85 87 S2 = 10.083 %3D 97 83 92 101 111 91 Print Done

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 parts (a) and (b) below. Click the icon to view the data table of IQ scores. a. Use a 0.05 significance level to test the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. What are the null and alternative hypotheses? Assume that population 1 consists of subjects with medium lead levels and population 2 consists of subjects with high lead levels. O B. Ho: H1*H2 O A. Ho: H1= H2 H1: H1> #2 H1: H1> H2 O C. Ho: H1= H2 D. Ho: H1SH2 H1: H1> H2
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 parts (a) and (b) below. Click the icon to view the data table of IQ scores. a. Use a 0.05 significance level to test the claim that the mean IQ scores for subjects with medium lead levels is higher than the mean for subjects with high lead levels. What are the null and alternative hypotheses? Assume that population 1 consists of subjects with medium lead levels and population 2 consists of subjects with high lead levels. O B. Ho: H1*H2 O A. Ho: H1= H2 H1: H1> #2 H1: H1> H2 O C. Ho: H1= H2 D. Ho: H1SH2 H1: H1> H2
IQ Scores Medium Lead Level O High Lead Level 72 n2 = 11 84 92 X2 = 88.555 85 87 S2 = 10.083 %3D 97 83 92 101 111 91 Print Done
Transcribed Image Text:IQ Scores Medium Lead Level O High Lead Level 72 n2 = 11 84 92 X2 = 88.555 85 87 S2 = 10.083 %3D 97 83 92 101 111 91 Print Done
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