An Experiment Was Performed on a Certain Metal to Determine

question 135

Multiple Choice

An experiment was performed on a certain metal to determine if the strength is a function of heating time.Partial results based on a sample of 10 metal sheets are given below.The simple linear regression equation is = 1 + 1X .The time is in minutes and the strength is measured in pounds per square inch,MSE = 0.5, = 30, = 104. Determine the 95% confidence interval for the average strength of a metal sheet when the average heating time is 2.5 minutes.

• A)(2.94 4.06)
• B)(1.78 5.22)
• C)(3.31 3.69)
• D)(1.94 3.06)

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