An Estimated Regression Equation That Was Fit to Estimate Ductility

question 9

Multiple Choice

An estimated regression equation that was fit to estimate ductility in steel using its carbon content was found to be significant at α = 0.05.The 95% prediction interval for the ductility of steel with 0.5% carbon content was determined to be 0.45 to 11.59.The correct interpretation is ________________________ .

• A)we can be 95% confident that the ductility of a particular type of steel with 0.5% carbon content is between 0.45 and 11.59
• B)we can be 95% confident that the average ductility of all steel with 0.5% carbon content is between 0.45 and 11.59
• C)the ductility of steel with 0.5% carbon content will be between 45 and 11.59 most (95%) of the time
• D)95% of the time the average ductility of steel with 0.5% carbon content will be between 0.45 and 11.59
• E)we can be 95% confident that all steel with have ductility measurements between 0.45 and 11.59

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