An Experiment Was Performed on a Certain Metal to Determine

question 77

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 mean value of metal strength when the average heating time is 4 minutes.

• A)(4.721 5.279)
• B)(4.523 5.477)
• C)(3.325 4.675)
• D)(4.325 5.675)

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