An experiment was conducted to evaluate the performances of a diesel engine run on synthetic (coal-derived) and

Question:

An experiment was conducted to evaluate the performances of a diesel engine run on synthetic (coal-derived) and petroleum-derived fuel oil (Journal of Energy Resources Technology, Mar. 1990). The petroleum-derived fuel used was a number 2 diesel fuel (DF-2) obtained from Phillips Chemical Company. Two synthetic fuels were used: a blended fuel (50% coal derived and 50% DF-2) and a blended fuel with advanced timing. The brake power (kilowatts) and fuel type were varied in test runs, and engine performance was measured. The following table gives the experimental results for the performance measure, mass burning rate per degree of crank angle.

The researchers fit the interaction model 

E(y) = β0 + β1x1 + β2x2 + β3x3 + β4x1x2 + β5x1x3

where

The results are shown in the SAS printout.

a. Conduct a test to determine whether brake power and fuel type interact. Test using α = .01.

b. Refer to the model, part a. Give the estimates of the slope of the y–x1 line for each of the three fuel types.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Statistics For Engineering And The Sciences

ISBN: 9781498728850

6th Edition

Authors: William M. Mendenhall, Terry L. Sincich

Question Posted: