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. E Click the icon to view the data table of IQ scores. a. Use a 0.01 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 IQ Scores O A. Ho: H1 SH2 H: H1> H2 OC. Ho: H1 H2 H: 41 > H2 D. Ho: H1 = H2 H1: H1 > H2 Medium Lead Level o High Lead Level 72 n2 = 11 83 92 85 The test statistic is (Round to two decimal places as needed.) X, = 89.369 84 S2 = 10.844 97 83 92 105 111 91 box and then click Check Answer.

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. E Click the icon to view the data table of IQ scores. a. Use a 0.01 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 IQ Scores O A. Ho: H1 SH2 H: H1> H2 OC. Ho: H1 H2 H: 41 > H2 D. Ho: H1 = H2 H1: H1 > H2 Medium Lead Level o High Lead Level 72 n2 = 11 83 92 85 The test statistic is (Round to two decimal places as needed.) X, = 89.369 84 S2 = 10.844 97 83 92 105 111 91 box and then click Check Answer.

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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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

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 0.01 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
1
i IQ Scores
O A. Ho: H1 S H2
H1: Hq>H2
D. Ho: H1=H2
O C. Ho: 44 # H2
Medium Lead Level High Lead Level
72
n2 = 11
83
92
85
The test statistic is
(Round to two decimal places as needed.)
X, = 89.369
84
= 10.844
97
83
92
105
111
91
Enter your answer in the answer box and then click Check Answer.

B.) Test statistic (rounded to 3 decimals)
C.) P-Value (rounded to 3 decimals)
D.) State the conclusion
E.) Construct a confidence interval suitable for testing
F.) Does the confidence interval support the claim

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