Question HeipOil 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 8 sectionsof 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 and1.732.381.392022.461.012.141.91b.One-Sample T: ROUGHVariableMeanStDevSE Mean95% CI0.17393 (1.46873, 2.29127)ROUGH1.8800080.49193a. 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: 0?Enter your answer in the edit fields and then click Check Answer1partremainingCeanAl8|)aere to search11/5

Question
Asked Nov 6, 2019

Please round to 5 decimal places

Question Heip
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 8 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
1.73
2.38
1.39
202
2.46
1.01
2.14
1.91
b.
One-Sample T: ROUGH
Variable
Mean
StDev
SE Mean
95% CI
0.17393 (1.46873, 2.29127)
ROUGH
1.88000
8
0.49193
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: 0
?
Enter your answer in the edit fields and then click Check Answer
1part
remaining
CeanAl
8
|
)a
ere to search
11/5
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Question Heip 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 8 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 1.73 2.38 1.39 202 2.46 1.01 2.14 1.91 b. One-Sample T: ROUGH Variable Mean StDev SE Mean 95% CI 0.17393 (1.46873, 2.29127) ROUGH 1.88000 8 0.49193 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: 0 ? Enter your answer in the edit fields and then click Check Answer 1part remaining CeanAl 8 | )a ere to search 11/5

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check_circleExpert Solution
Step 1

Step by step procedure to obtain the confidence interval using MINITAB software is given below:

  • Choose Stat > Basic Statistics > 1-Sample t.
  • In One or more samples, each in a column, select Rough.
  • Check Options, enter Confidence level as 95.
  • Choose Mean ≠ Hypothesized mean in a...
One-Sample T: Rough
Descriptive Statistics
95% CI for u
(1.469, 2.291)
N Mean StDev SE Mean
8 1.88 0.4920.174
:mean of Rough
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One-Sample T: Rough Descriptive Statistics 95% CI for u (1.469, 2.291) N Mean StDev SE Mean 8 1.88 0.4920.174 :mean of Rough

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