Question

Good Treads and Speed Tracks manufacture tires. Good Treads claims that their tires last longer than Speed Tracks tires. A car company decided to test Good Tread's claim. They purchased 20 sets of Good Tread's tires and 20 sets of Speed Track's tires. They tested the lifetime of each tire by simulating 1,000 miles of driving conditions for each set of tires each day. At the end of each day, they measured the tread on each of the tires. Once the tire tread drops below minimum safe tread depth, the tire is considered to have passed its lifetime.
After observing the lifetime of each tire, the car company reported that the average lifetime of a Good Treads tire is 55,000 miles and the average lifetime of a Speed Tracks tire is 65,000 miles.

Given the car company's report, what conclusion can be made regarding the average lifetime of Good Treads and Speed Tracks tires?
There is not enough information to make any conclusions from the car company's report.


Good Treads' claim is false; therefore, it can be concluded that Speed Tracks tires last longer than Good Treads tires.


Good Treads' claim is false; therefore, it can be concluded that Good Treads tires last longer than Speed Tracks tires.


Good Treads' claim is true; therefore, it can be concluded that Good Treads tires last longer than Speed Tracks tires.

Answer 1

Good Treads' claim is false; therefore, it can be concluded that Speed Tracks tires last longer than Good Treads tires.

D

Answer 2

The answer is B... good treads claim is false therefore it can be concluded that speed tracks tires last longer than good treads tires