In a study of the relationship between the Brinell

Chapter 7, Problem 2E

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QUESTION:

In a study of the relationship between the Brinell hardness \((x)\) and tensile strength in ksi \((y)\) of specimens of cold drawn copper, the least-squares line was \(y=-196.32+2.42x\).

a. Predict the tensile strength of a specimen whose Brinell hardness is 102.7.

b. If two specimens differ in their Brinell hardness by 3, by how much do you predict their tensile strengths to differ?

Equation Transcription:

Text Transcription:

(x)

(y)

y=-196.32+2.42x

Questions & Answers

QUESTION:

In a study of the relationship between the Brinell hardness \((x)\) and tensile strength in ksi \((y)\) of specimens of cold drawn copper, the least-squares line was \(y=-196.32+2.42x\).

a. Predict the tensile strength of a specimen whose Brinell hardness is 102.7.

b. If two specimens differ in their Brinell hardness by 3, by how much do you predict their tensile strengths to differ?

Equation Transcription:

Text Transcription:

(x)

(y)

y=-196.32+2.42x

ANSWER:

 

Step 1 of 2


a. Predict the tensile strength of a specimen whose Brinell hardness is 102.7.

Answer: The tensile strength of a specimen whose Brinell hardness is 102.7 is predicted to be 250.444 ksi.

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