Q1 A study on the effect of different lubricating oil on fuel economy in car engines is investigated. The fuel economy is measured using the brake-specific fuel consumption after the engine running...

Use the Dunnett’s test to make comparisons among the three lubricating oils
to determine specifically which oils differ in brake-specific fuel consumption
at a 0.05 level of significance. Let lubrication oil 1 is the control.

Extracted text: Q1 A study on the effect of different lubricating oil on fuel economy in car engines is investigated. The fuel economy is measured using the brake-specific fuel consumption after the engine running for 15 minutes. There are five different cars selected for the study and the experiment is conducted using randomized completely block design (RCBD) as in Table Q1. Table Q1 Car Oil 1 2 3 4 5 1 0.532 0.617 0.498 0.363 0.581 0.588 0.677 0.566 0.317 0.593 0.547 0.514 0.482 0.411 0.579 23