The EPA is interested in studying the average hourly carbon monoxide levels near a San Diego Freeway during summer weekdays as part of a larger study to assess the effectiveness of catalytic converters.  A measurement station was set up 25 feet from the freeway.  The prevailing winds during the daylight hours transported the CO emissions from the highway toward the station.  The freeway at this location lay along a North 145 degree line, and the winds traveled from North 145 degrees to North 325 degrees during daylight hours.  For every hour, 1 to 24, the average summer weekday CO concentrations (parts/million), traffic density (TD = traffic count / traffic speed), and average perpendicular wind-speed component (WS) were recorded.  The wind-speed component was calculated using the following formula:  WSp = Wind Speed X COS (Wind Direction - 235 degrees).  Note:  A site map is shown at the bottom of the page.

Analyze the data and determine what, if any, relationships can be drawn.   Review the data and the map of the site layout, and present any findings you deem important.  Use the standard written format as stated in the syllabus.

Recorded site values are given in the table below:
 
 
 

		PROBLEM SET 2 DATA
		HOUR	CO	TD	WSp
		1	2.4	50	-0.2
		2	1.7	26	0
		3	1.4	16	0
		4	1.2	10	0
		5	1.2	12	0.1
		6	2	41	-0.1
		7	3.4	157	-0.1
		8	5.8	276	-0.2
		9	6.8	282	0.2
		10	6.6	242	1
		11	6.6	200	2.3
		12	6.3	186	3.8
		13	5.8	179	4.6
		14	5.5	178	5.4
		15	5.9	203	5.9
		16	6.8	264	5.9
		17	7	289	5.6
		18	7.4	308	4.9
		19	6.4	267	3.8
		20	5	190	2.5
		21	3.8	125	1.4
		22	3.5	120	0.6
		23	3.3	116	0.4
		24	3.1	87	0.1

                    A site map is shown below for Reference