Question

A motorcycle's fuel efficiency represents the ninth decile of vehicles in its class. Make an observation about the motorcycle's fuel efficiency.

A) The motorcycle's fuel efficiency is greater than the fuel efficiency for 100% of vehicles in its class.

B) The motorcycle's fuel efficiency is greater than the fuel efficiency for 10% of vehicles in its class.

C) The motorcycle's fuel efficiency is greater than the fuel efficiency for 9% of vehicles in its class.

D) The motorcycle's fuel efficiency is greater than the fuel efficiency for 90% of vehicles in its class.

Answer 1

The ninth decile indicates that the motorcycle's fuel efficiency is greater than that of 90% of vehicles in its class, which corresponds to answer choice D.

Step-by-step explanation:

When a motorcycle's fuel efficiency represents the ninth decile of vehicles in its class, it means that the motorcycle's fuel efficiency is greater than the fuel efficiency for 90% of vehicles in its class.

Deciles divide a set into ten equal parts, so the ninth decile refers to the top 10% of observations.

This corresponds to answer choice D: The motorcycle's fuel efficiency is greater than the fuel efficiency for 90% of vehicles in its class.