Question

6. Ethical guidelines for statistical practice

6. Ethical guidelines for statistical practice Aa Aa In recent years, the price of gasoline has become increasingly more expensive. Consequently, one of the major factors considered by consumers when purchasing a new vehicle is mpg (miles per gallon) Suppose that a vehicle manufacturer has created a new, more fuel-efficient vehicle and wants to estimate the vehicle's mean mpg highway (that is, mpg when driven only on the highway). It is in the manufacturer's best interest that the vehide has a mean of at least 25 mpg highway The manufacturer tests a random sample of vehicles to determine their mpg when driven only on the highway and finds that the sample mean is 29 mpg highway. The manufacturer decides to test another (independent) random sample of the same size and determines the second sample's mean is 27 mpg highway. The ethical practice for the manufacturer is to report an estimated mean of because it This result because it is than the desired mean of 25 mpg highway.

Answer 1

The ethical practice for the manufacturer is to report an estimated mean of 28 mpg on the highway because it is the mean value of two different sample of same size. This result conclude that The null hypothesis that is mean mpg on highway at least 25 mpg is accepted because the sample mean is greater than the desired mean of 25 mpg highway.