which t-test would you use to interpret the following question:

Sample Location	Gas Price Time 1		Sample Location	Gas Price Time 2
East Coast	$ 2.62		Texas	$ 2.46
New England	$ 2.66		New York	$ 2.71
Central Atlantic	$ 2.64		Boston, MA	$ 2.67
Lower Atlantic	$ 2.47		Chicago, IL	$ 2.99
Midwest	$ 2.55		Houston, TX	$ 2.44
Gulf Coast	$ 2.36		Los Angeles, CA	$ 3.70
West Coast	$ 3.14		New York Harbor	$ 2.68
California	$ 3.19		San Francisco, CA	$ 3.77
Massachusetts	$ 2.60