Question

City	Population	% incomes below $5,000	% unemployed	Murders per million inhabitants per year
1	587000	16.5	6.2	11.2
2	643000	20.5	6.4	13.4
3	635000	26.3	9.3	40.7
4	692000	16.5	5.3	5.3
5	1248000	19.2	7.3	24.8
6	643000	16.5	5.9	12.7
7	1964000	20.2	6.4	20.9
8	1531000	21.3	7.6	35.7
9	713000	17.2	4.9	8.7
10	749000	14.3	6.4	9.6
11	7895000	18.1	6	14.5
12	762000	23.1	7.4	26.9
13	2793000	19.1	5.8	15.7
14	741000	24.7	8.6	36.2
15	625000	18.6	6.5	18.1
16	854000	24.9	8.3	28.9
17	716000	17.9	6.7	14.9
18	921000	22.4	8.6	25.8
19	595000	20.2	8.4	21.7
20	3353000	16.9	6.7	25.7

1-What percentage of the differences in murder rates can we explain using % of population with incomes below $5,000?

Is this correlation significant in the population?

2-Now let's look at the correlation between the % of unemployed people and murders per year. calculate r

3-Would this correlation be significant in the population?

4-If we knew that % unemployed for a city was 6.0 what would we predict the murders per million inhabitants per year should be?

5-If we knew that % unemployed for a city was 10.0 what would we predict the murders per million inhabitants per year should be?

Answer 1

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