a socialogist expects the life expenancy of people in africa is different than the life expantancy of people in asia. the data shown in the table below. determine the 95% confidence interval for the difference in the population mean africa asia mean1= 63.3 yr mean2= 65.2 STD1= 9.1 yr STD2= 7.3 yr n1=120 n2= 150 calculate the critical value. use σ=0.05 A) -11.4 < μ1 - μ2 < -7.6 B)-12.2< μ1 - μ2 < -6.9 C). -13.5< μ1 - μ2 < -6.3
a socialogist expects the life expenancy of people in africa is different than the life expantancy of people in asia. the data shown in the table below. determine the 95% confidence interval for the difference in the population mean africa asia mean1= 63.3 yr mean2= 65.2 STD1= 9.1 yr STD2= 7.3 yr n1=120 n2= 150 calculate the critical value. use σ=0.05 A) -11.4 < μ1 - μ2 < -7.6 B)-12.2< μ1 - μ2 < -6.9 C). -13.5< μ1 - μ2 < -6.3
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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Question
a socialogist expects the life expenancy of people in africa is different than the life expantancy of people in asia. the data shown in the table below. determine the 95% confidence interval for the difference in the population
africa | asia |
mean1= 63.3 yr | mean2= 65.2 |
STD1= 9.1 yr | STD2= 7.3 yr |
n1=120 | n2= 150 |
calculate the critical value. use σ=0.05
A) -11.4 < μ1 - μ2 < -7.6 B)-12.2< μ1 - μ2 < -6.9 C). -13.5< μ1 - μ2 < -6.3
Expert Solution
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Step 1
Step-by-step procedure to obtain the value of using STATKEY:
- Choose Normal under Theoretical Distributions.
- In Normal Distribution, click Edit Parameters.
- Enter mean as 0 and standard deviation as 1 and click Ok.
- Click Two-Tail.
- Click OK.
Output obtained using the MINITAB software is given below:

Step 2
From the output, the value of is 1.96 for 95% confidence.
The 95% confidence interval is obtained as follows:

Step by step
Solved in 3 steps with 2 images
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