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Suppose an automobile manufacturer designed a radically new lightweight engine and wants to recommend the grade of gasoline.

Answer :

12 people make up the sample. There have been four therapies. As a result, the sum of square error has 8 degrees of freedom, which is equal to the sample size minus the number of treatments.

Suppose an automobile manufacturer designed a radically new lightweight engine and wants to recommend the greade of gggasoline?

Consider a scenario in which a car maker wants to suggest the grade of gasoline that will offer the best fuel efficiency for a totally innovative lightweight engine: Regular economy, premium, and super premium are the four classifications. On the test track, the test car completed three trial runs using each of the four grades. Each grade's mileage was kept track of. Test the statement that the mileage for each fuel is the same at the 0.05 level. (15 marks) Economy of Kilometers per Liter Premium

The number of treatments less one gives the degree of freedom as 3, which is 3. Entering the F table (pp. 723-24) with 3 degrees of freedom for the numerator and 8 degrees of freedom for the denominator yields the theoretical F value.

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