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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