Question

QUESTION 3. (3 marks) Taxi company manager is trying to decide whether the use of radial tires instead of regular belted tires improves fuel economy. Twelve cars were equipped with radial tires and driven over a prescribed test course. Without changing drivers, the same cars were then equipped with regular belted tires and driven once again over the test course. The gasoline consumption, in kilometres per litter, was recorded as follows Kilometers per Liter Radial Tires Belted Tires 4.2 4.1 4.7 4.9 6.6 6.2 7.0 6.9 6.7 6.8 4.5 4.4 5.7 5.7 6.0 5.8 7.4 6.9 4.9 4.7 6.1 6.0 5.2 4.9 Answer: Use independent samples t- test to test the null hypothesis H0: $\mu_1 = \mu_2$

          QUESTION 3.
(3 marks)
Taxi company manager is trying to decide whether the use of radial tires instead of regular belted tires
improves fuel economy. Twelve cars were equipped with radial tires and driven over a prescribed test
course. Without changing drivers, the same cars were then equipped with regular belted tires and
driven once again over the test course. The gasoline consumption, in kilometres per litter, was recorded
as follows
Kilometers per Liter
Radial Tires	Belted Tires
4.2	4.1
4.7	4.9
6.6	6.2
7.0	6.9
6.7	6.8
4.5	4.4
5.7	5.7
6.0	5.8
7.4	6.9
4.9	4.7
6.1	6.0
5.2	4.9
Answer:
Use independent samples t-
test to test the null hypothesis
H0: $\mu_1 = \mu_2$

QUESTION 3.
(3 marks)
Taxi company manager is trying to decide whether the use of radial tires instead of regular belted tires
improves fuel economy. Twelve cars were equipped with radial tires and driven over a prescribed test
course. Without changing drivers, the same cars were then equipped with regular belted tires and
driven once again over the test course. The gasoline consumption, in kilometres per litter, was recorded
as follows
Kilometers per Liter
Radial Tires Belted Tires
4.2 4.1
4.7 4.9
6.6 6.2
7.0 6.9
6.7 6.8
4.5 4.4
5.7 5.7
6.0 5.8
7.4 6.9
4.9 4.7
6.1 6.0
5.2 4.9
Answer:
Use independent samples t-
test to test the null hypothesis
H0: μ1 = μ2

Added by Robert J.

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