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Name: To construct a confidence interval for the difference between two popu
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Description: To construct a confidence interval for the difference between two population means μ1−μ2, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n1≥30 and n2≥30.

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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To construct a confidence interval for the difference between two population means μ1−μ2, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n1≥30 and n2≥30.
Also, the samples must be randomly selected and independent.

The descriptive statistics for the annual salaries from a random sample of microbiologists from two regions are shown below. Construct a 95% confidence interval for the difference between the mean annual salaries.

x1=$102,710,

n1=38,

and

σ1=$9305;

x2=$85,610,

n2=45,

and

σ2=$9320

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