In a study of the role of young drivers in automobile accidents, data on the percentage...

In a study of the role of young drivers in automobile accidents, data on the percentage of licensed drivers under the age of 21 and the number of fatal accidents per 1000 licenses were determined for 32 cities. The first column contains a number as city code, the second column contains the percentage of drivers who are under 21, and the third column contains the number of fatal accidents is dependent upon the proportion of licensed drivers that are under 21.

Use 30 degrees of freedom, and alpha as 0.01 to get a critical value of 1.697)

16. What is the margin of error for calculating a 90% interval for the slope of the true regression line? (i.e. 1.697 by the standard deviation of the slope

17. What is the lower 90% confidence limit for the slope?

18. What is the upper 90% confidence limit of the slope?

19. What is the value of the test statistic for testing this hypothesis?

1	11	2.352
2	15	3.392
3	11	2.488
4	17	2.707
5	15	2.739
6	15	3.51
7	18	3.867
8	14	1.679
9	8	0.65
10	8	0.965
11	18	3.447
12	9	0.23
13	5	0
14	11	1.477
15	14	2.378
16	10	1.458
17	16	2.568
18	16	3.018
19	8	1.229
20	14	1.474
21	8	1.415
22	20	3.796
23	15	1.971
24	8	0.467
25	10	1.526
26	11	0.676
27	15	2.526
28	9	1.311
29	5	0.223
30	13	2.989
31	8	1.107
32	12	0.401

Expert Solution

	drivers (x)	accidents (y)	(x-x_)^2	(y-y_)^2	(x-x_)(y-y_)
1	11	2.352	1.1963	0.2265	-0.5205
2	15	3.392	8.4463	2.2980	4.4056
3	11	2.488	1.1963	0.3744	-0.6693
4	17	2.707	24.0713	0.6904	4.0766
5	15	2.739	8.4463	0.7446	2.5078
6	15	3.51	8.4463	2.6696	4.7485
7	18	3.867	34.8838	3.9637	11.7588
8	14	1.679	3.6338	0.0388	-0.3757
9	8	0.65	16.7588	1.5033	5.0193
10	8	0.965	16.7588	0.8301	3.7298
11	18	3.447	34.8838	2.4677	9.2781
12	9	0.23	9.5713	2.7096	5.0926
13	5	0	50.3213	3.5198	13.3086
14	11	1.477	1.1963	0.1593	0.4365
15	14	2.378	3.6338	0.2519	0.9567
16	10	1.458	4.3838	0.1748	0.8754
17	16	2.568	15.2588	0.4787	2.7027
18	16	3.018	15.2588	1.3039	4.4605
19	8	1.229	16.7588	0.4187	2.6491
20	14	1.474	3.6338	0.1617	-0.7665
21	8	1.415	16.7588	0.2126	1.8876
22	20	3.796	62.5088	3.6860	15.1792
23	15	1.971	8.4463	0.0090	0.2758
24	8	0.467	16.7588	1.9856	5.7685
25	10	1.526	4.3838	0.1226	0.7330
26	11	0.676	1.1963	1.4402	1.3126
27	15	2.526	8.4463	0.4224	1.8888
28	9	1.311	9.5713	0.3193	1.7483
29	5	0.223	50.3213	2.7327	11.7267
30	13	2.989	0.8213	1.2385	1.0086
31	8	1.107	16.7588	0.5915	3.1485
32	12	0.401	0.0088	2.1759	0.1383
	387	60.036	474.7188	39.9221	118.4906

orchestra answered 1 year ago

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