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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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Question

When subjects were treated with a drug, their systolic blood pressure readings (in mm Hg) were measured before and after the drug was taken. Results are given in the table below. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Using a

0.05

significance level, is there sufficient evidence to support the claim that the drug is effective in lowering systolic blood pressure?

Before	175	188	210	206	206	194	158	159	179	205	157	189


After	162	179	179	173	173	148	159	163	147	143	152	155

Find test statistics:

Find P-value:

Conclusion:

Construct a confidence interval suitable for testing the claim that the mean amount of strontium-90 from city #1 residents is greater than the mean amount from city #2 residents.

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