The city of Daytona Beach was concerned that the new ordinance which had raised beach driving fee may have a negative impact on tourism. The city has engaged you to investigate this problem. You collected data from 20 different days (10 before and 10 after) reflecting number of vehicles on beach before and after the ordinance, taking care to control for weather conditions and other variables as much as possible.
Data
|
Day
|
Vehicles on the beach before the new ordinance
|
Day
|
Vehicles on the beach after the new ordinance
|
|
8-1-03
|
221.00
|
8-1-04
|
245.00
|
|
8-2-03
|
222.00
|
8-2-04
|
222.00
|
|
8-3-03
|
343.00
|
8-3-04
|
333.00
|
|
8-4-03
|
234.00
|
8-4-04
|
111.00
|
|
8-5-03
|
112.00
|
8-5-04
|
444.00
|
|
8-6-03
|
221.00
|
8-6-04
|
111.00
|
|
8-7-03
|
222.00
|
8-7-04
|
111.00
|
|
8-8-03
|
343.00
|
8-8-04
|
222.00
|
|
8-9-03
|
234.00
|
8-9-04
|
123.00
|
|
8-10-03
|
112.00
|
8-10-04
|
123.00
|
a. Determine the null hypothesis.
b. What test did you use?
c. Describe the results. Are they statistically significant?