An engineer suspects that a power plant in the city is increasing the air pollution in the vicinity of the plant. A sample of measurements of carbon monoxide (in mg/m3 of air) in the vicinity of the plant (Group 1) is obtained for comparison with another sample obtained from other locations (Group 2) in the city. Dataset is available at pollution.txt Assume that the measurements for both groups follow a normal distribution and the populations' variances are equal. By the 95% confidence interval for the difference between the means of the first group and the second group. i.e., ₁-2, we can conclude that A: With 95% confidence, we have evidence to indicate that there is a difference between the amount of carbon monoxide in the vicinity of the plant and other places. B: With 95% confidence, we have NO evidence to indicate that there is a difference between the amount of carbon monoxide in the vicinity of the plant and other places. OA OB

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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[Statistics] Which is correct? The data is given below

Pollution Group
40  1
16  1
44  1
47  1
26  1
64  1
35 1 
53 1 
45 1 
52 1 
31 1 
38 1 
44 1 
29 1 
45 1 
47 1
34 2
28 2 
36 2 
19 2 
35 2 
37 2
36 2 
39 2 
32 2
25 2 
37 2 
40 2 
44 2 
38 2

An engineer suspects that a power plant in the city is increasing the air pollution in the vicinity of the plant. A
sample of measurements of carbon monoxide (in mg/m3 of air) in the vicinity of the plant (Group 1) is obtained
for comparison with another sample obtained from other locations (Group 2) in the city.
Dataset is available at pollution.txt↓
Assume that the measurements for both groups follow a normal distribution and the populations' variances are
equal. By the 95% confidence interval for the difference between the means of the first group and the second
group. i.e., ₁-2, we can conclude that
A: With 95% confidence, we have evidence to indicate that there is a difference between the amount of
carbon monoxide in the vicinity of the plant and other places.
B: With 95% confidence, we have NO evidence to indicate that there is a difference between the amount of
carbon monoxide in the vicinity of the plant and other places.
ОА
OB
Transcribed Image Text:An engineer suspects that a power plant in the city is increasing the air pollution in the vicinity of the plant. A sample of measurements of carbon monoxide (in mg/m3 of air) in the vicinity of the plant (Group 1) is obtained for comparison with another sample obtained from other locations (Group 2) in the city. Dataset is available at pollution.txt↓ Assume that the measurements for both groups follow a normal distribution and the populations' variances are equal. By the 95% confidence interval for the difference between the means of the first group and the second group. i.e., ₁-2, we can conclude that A: With 95% confidence, we have evidence to indicate that there is a difference between the amount of carbon monoxide in the vicinity of the plant and other places. B: With 95% confidence, we have NO evidence to indicate that there is a difference between the amount of carbon monoxide in the vicinity of the plant and other places. ОА OB
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