Question

The data in part (a) represent average annual hours lost per person and average annual gallons of fuel wasted per person in traffic delays. Suppose that instead of using average data for different cities, you selected one person at random from each city and measured the annual number of hours lost x for that person and the annual gallons of fuel wasted y for the same person.

x (hr)	24	4	22	40	19	29	2	35
y (gal)	61	8	11	51	23	35	4	70

Verify that Σx = 175, Σx² = 5107, Σy = 263, Σy² = 13,177, and Σxy = 7688.

Compute r.

Answer 1

4	12.32	16	151.7824	49.28
5	13.1	25	171.61	65.5
6	16.68	36	278.2224	100.08
7	20.26	49	410.4676	141.82
8	22.44	64	503.5536	179.52
9	22.72	81	516.1984	204.48
10	23.4	100	547.56	234
11	26.98	121	727.9204	296.78
12	28.66	144	821.3956	343.92