Answer:
Null hypothesis: βͺβ = βͺβ
Alternative hypothesis: βͺβ β βͺβ
Step-by-step explanation:
Null hypothesis: βͺβ = βͺβ
Alternative hypothesis: βͺβ β βͺβ
where βͺβ represents mean of sample of new cars and βͺβ represents mean of sample of older cars.
Using a difference in means t test will help determine if new owners tune up their cars more frequently than older car owners.