Question

22 A consumer organization was concerned that an automobile manufacturer was misleading customers by overstating the average fuel efficiency (measured in miles pel gallon or mpg) of a particular car model. The model was advertised to get 27 mpg. To investigate the researchers selected a random sample of 10 cars of that model. Each car was then randomly assigned a different driver. Each car was driven for 5000 miles and the total fuel consumption was used to compute the mpg for the car. What is the parameter of interest? A the mean mpg of the 10 cars B. the mpg measurements of this car model C. the mean mpg of all cars of this particular model D. the population of all cars of this particular model See & Co

Answer 1

The organization was concerend that an automobile manufacturer was misleading customers by overstating about the avergae fuel efficiency (measured in miles er gallon or mpg). So they started investigation on it.

So they select a sample and do the necessary tests to arrive at the average fuel efficiency and then they will decide whethet the automobile manufacturer was misleading customers or not of the whole set of cars

So the paramter of interest here is the mean mpg of all the cars of this particular model

So answer is C