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 summation X^2 = 104. Determine the 95% prediction interval for the strength of a metal sheet when the average heating time is 2.5 minutes. (1.68, 5.32) (2.94, 4.06) (1.78, 5.22) (0.78, 4.22) Summation x = 30, hat y = 1 + 1X . The time is in minutes and the strength is measured in pounds per square inch, MSE = 0.5, Solution (1.68, 5.32) .

1. 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 + 1 X . The time is in minutes and the strength is measured
in pounds per square inch, MSE = 0.5, = 30, = 104.
Determine the 95% prediction interval for the strength of a metal sheet when the average heating
time is 2.5 minutes.
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 summation X^2 = 104. Determine the 95% prediction interval for
the strength of a metal sheet when the average heating time is 2.5 minutes. (1.68, 5.32) (2.94,
4.06) (1.78, 5.22) (0.78, 4.22) Summation x = 30, hat y = 1 + 1X . The time is in minutes and the
strength is measured in pounds per square inch, MSE = 0.5,
Solution
(1.68, 5.32)