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(a) Steel used for water pipelines is coated on the inside with cement mortar to prevent corrosion. In an experiment of the mortar coatings of a pipeline used in a water project, the mortar thickness was measured for a very large number of specimens. The mean and standard deviation were found to be 0.62 inch and 0.13 inch, respectively, and the thickness was found to be normally distributed. (i) What proportion of the pipelines that a randomly selected has the mortar thickness between 0.55 and 0.6 inch?

(a) Steel used for water pipelines is coated on the inside with cement mortar to prevent corrosion. In an experiment of the mortar coatings of a pipeline used in a water project, the mortar thickness was measured for a very large number of specimens. The mean and standard deviation were found to be 0.62 inch and 0.13 inch, respectively, and the thickness was found to be normally distributed. (i) What proportion of the pipelines that a randomly selected has the mortar thickness between 0.55 and 0.6 inch?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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(a) Steel used for water pipelines is coated on the inside with cement mortar to prevent corrosion. In an experiment of the mortar coatings of a pipeline used in a water project, the mortar thickness was measured for a very large number of specimens. The mean and standard deviation were found to be 0.62 inch and 0.13 inch, respectively, and the thickness was found to be normally distributed. (i) What proportion of the pipelines that a randomly selected has the mortar thickness between 0.55 and 0.6 inch?
Transcribed Image Text:(a) Steel used for water pipelines is coated on the inside with cement mortar to prevent corrosion. In an experiment of the mortar coatings of a pipeline used in a water project, the mortar thickness was measured for a very large number of specimens. The mean and standard deviation were found to be 0.62 inch and 0.13 inch, respectively, and the thickness was found to be normally distributed. (i) What proportion of the pipelines that a randomly selected has the mortar thickness between 0.55 and 0.6 inch?
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