Oil field pipes are internally coated in order to prevent corrosion. Researchers at a university investigated the influence that coating may have on thesurface roughness of oil field pipes. A scanning probe instrument was used to measure the surface roughness of each section in a sample of 10sections of coated interior pipe. The data (in micrometers) are shown in the table to the right. A Minitab analysis of the data is given below. Completeparts a and b.1.772.371.242.152.332.451.012011.921.51One-Sample T: ROUGH95% CI0.15543 (1.52439, 2.22761)SE MeanStDevMeanNVariable1.876000.4915110ROUGHa. Locate a 95% confidence interval for the mean surface roughness of coated interior pipe on the accompanying Minitab printout(Type integers or a decimals.)frect:?Enter your answer in the edit flelds and then click Check AnswerChec AnsierCearAl1 partremainingaere to search

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Asked Nov 6, 2019
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TI 84 steps. Round to 5 decimals

Oil field pipes are internally coated in order to prevent corrosion. Researchers at a university investigated the influence that coating may have on the
surface roughness of oil field pipes. A scanning probe instrument was used to measure the surface roughness of each section in a sample of 10
sections of coated interior pipe. The data (in micrometers) are shown in the table to the right. A Minitab analysis of the data is given below. Complete
parts a and b.
1.77
2.37
1.24
2.15
2.33
2.45
1.01
201
1.92
1.51
One-Sample T: ROUGH
95% CI
0.15543 (1.52439, 2.22761)
SE Mean
StDev
Mean
N
Variable
1.87600
0.49151
10
ROUGH
a. Locate a 95% confidence interval for the mean surface roughness of coated interior pipe on the accompanying Minitab printout
(Type integers or a decimals.)
frect:
?
Enter your answer in the edit flelds and then click Check Answer
Chec Ansier
CearAl
1 part
remaining
a
ere to search
help_outline

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Oil field pipes are internally coated in order to prevent corrosion. Researchers at a university investigated the influence that coating may have on the surface roughness of oil field pipes. A scanning probe instrument was used to measure the surface roughness of each section in a sample of 10 sections of coated interior pipe. The data (in micrometers) are shown in the table to the right. A Minitab analysis of the data is given below. Complete parts a and b. 1.77 2.37 1.24 2.15 2.33 2.45 1.01 201 1.92 1.51 One-Sample T: ROUGH 95% CI 0.15543 (1.52439, 2.22761) SE Mean StDev Mean N Variable 1.87600 0.49151 10 ROUGH a. Locate a 95% confidence interval for the mean surface roughness of coated interior pipe on the accompanying Minitab printout (Type integers or a decimals.) frect: ? Enter your answer in the edit flelds and then click Check Answer Chec Ansier CearAl 1 part remaining a ere to search

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Expert Answer

Step 1

Solution: We are given the below data in the question:

1.77, 2.37, 1.24, 2.15, 2.33, 2.45, 1.01, 2.01, 1.92, 1.51

 

Step 2

We have to find the 95% confidence interval for the mean surface roughness of coated interior pipe.

We are given the minitab output. 

 

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One-Sample T: ROUGH SE Mean 0.15543 (152439, 2.22761) 95% CL StDev Variable N Mean 1.87600 0.49151 ROUGH 10

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Step 3

Therefore, the 95% confidence i...

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(52439,2.22761)

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