# Statistics

posted by .

The turnover (in millions of pounds) for 8 train companies and 8 coach companies are given below.

Train 4.3 13.2 134 88 92 66.5 122.1 102
Coach 2.2 31 44 72 19 89.3 55.9 43.1

(a)Using an appropriate statistical test determine whether train companies or coach companies have higher turnovers. State the test used, your null hypothesis, your conclusion and the evidence you base that conclusion upon.
(b)Find the 99% confidence interval for the train companies’ variation in turnover.
(c) Perform an F test (using α=0.05) to determine whether the difference in variation between train and coach company turnover is significant.

## Similar Questions

1. ### Math

Train A and train B leave station going in opposite directions. Train B leaves 1/2 later than train A. Train B travels 80km/h faster than Train A. In 2 hours the trains are 3200KMs apart. How fast is each train traveling.. thank you
2. ### algebra

tains A and train B are travling in the same dicrtion on a parral track train A is traving 60 mph and train B is traviling 70 mph train A passes a staion at 11.15 am and train B passes the same station at 11.45 am at what time will …
3. ### math

Train A is 12 mph slower than train B. Train A travels 230 miles in the same time it takes train B to travel 290 miles. Find the speed of each train.
4. ### Physics

Some how TRAIN A travelling at 36 m/s, is accidentally sidetracked onto the train track for TRAIN A. The TRAIN A engineer spots TRAIN A 100 m ahead on the same track and travelling in the same direction. The engineer jams on the brakes …
5. ### algebra

please tell me if these are right. Soybean meal is 12% protein, cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240-lb. mixture that is 11% protein?
6. ### physics

a train slows down from 104m/s to 76m/s with constant decceleration in 440m. 1) what is the acceleration of the train?
7. ### statistics

A football coach claims that the average weight of all the opposing teams’ members is 225 pounds. For a test of the claim, a sample of 50 players is taken from all the opposing teams. The mean is found to be 230 pounds, and the standard …
8. ### Health

Mandy wants to win the local youth tennis tournament next fall. Her coach has said that her serve is powerful enough, but she suggests Mandy train with a jump rope to improve her ability to cover more ground on the court when she’s …
9. ### English 10

This poem describes a train as if it were a horse. Examine the imagery of the stanza in bold. What does it describe?
10. ### math

Train #1 leaves san diego at 4pm. train #2 leaves san diego at 6pm.train #2 travels 42 mph faster than train #1. if train # 2 overtakes train #1 at 8pm, what is the speed of each train?

More Similar Questions