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Ryan, Engineer
Category: Calculus and Above
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Experience:  B.S. in Civil Engineering
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4. The torque, T Nm, required to rotate shafts of different

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4. The torque, T Nm, required to rotate shafts of different diameters, D mm, on a machine has been tested and recorded below:
D(mm) 6 10 14 18 21 25 T(Nm) 5.5 7.0 9.5 12.5 13.5 16.5
A)Use the method of least squares to determine the linear regression equation that relates the torque to the diameter.
B)Estimate the value of torque required when the diameter is 16 mm & the coefficient of correlation between these variables.

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