Another interesting chart

I was asked to find the correlation coefficient between race and income level, and I was actually pretty shocked at the severity of disparities. Color me ignorant.

                     



Correlation Coefficient























-0.013939347


























1

2

3

4

5

6

7

8

9




Race
Count
Population
$1,604 or less
$1,605 - $2,159
$2,160 - $2,714
$2,715 - $3,269
$3,270 - $3,824
$3,825 - $4,379
$4,380 - $4,934
$4,935 - $5,489
$5,490 or above






Count
%
Count
%
Count
%
Count
%
Count
%
Count
%
Count
%
Count
%
Count
%


2
African-American
194
31.1%
106
62.4%
23
43.4%
4
30.8%
15
22.4%
6
19.4%
1
3.2%
2
8.3%
1
3.8%
12
8.1%


4
Asian/Pacific Islander
94
15.1%
8
4.7%
6
11.3%
2
15.4%
11
16.4%
3
9.7%
3
9.7%
2
8.3%
10
38.5%
43
28.9%


3
Hispanic
46
7.4%
19
11.2%
6
11.3%
2
15.4%
5
7.5%
0
0.0%
0
0.0%
2
8.3%
1
3.8%
5
3.4%


5
Native American/Alaskan
2
0.3%
1
0.6%
0
0.0%
0
0.0%
1
1.5%
0
0.0%
0
0.0%
0
0.0%
0
0.0%
0
0.0%


1
White
287
46.1%
36
21.2%
18
34.0%
5
38.5%
35
52.2%
22
71.0%
27
87.1%
18
75.0%
14
53.8%
89
59.7%



Total
623
100.0%
170

53

13

67

31

31

24

26

149

I will qualify this data as before; be careful what you read into it, and remember that I am no authority.

The numbers on the far left are the actual ethnic codes in the data I received. I manually cross-referenced them with the Ethnic question from the Kindergarten Application form. In a similar fashion, the number across the top of the income ranges (1-9) are the income codes I received, and I cross-referenced them to the income levels as question on that same form. It is entirely possible that what I did was incorrect, but so far nobody from Unit 4 has either confirmed or denied.

The “%” column is the Count for that Race for that Income Level, divided by the total count for that income level. For example, The “%” in the first income range for Native American’s is (1)/(170) = .00588 = .6%. Keep in mind that there are many different ways to look at the data. For instance, the third income bracket ($2,160 – $2,714) only has 13 people in it, thus the percentages seem a little larger than more “populated” income brackets, such as the first and the last. Another angle would be to see the percentages based on the total kindergarten population, or by the racial population.

                    


Race
Count
Population
$1,604 or less
$1,605 - $2,159
$2,160 - $2,714
$2,715 - $3,269
$3,270 - $3,824
$3,825 - $4,379
$4,380 - $4,934
$4,935 - $5,489
$5,490 or above





Count
%
Count
%
Count
%
Count
%
Count
%
Count
%
Count
%
Count
%
Count
%


Percentage as a function of Overall Total


African-American
194
31.1%
106
17.0%
23
3.7%
4
0.6%
15
2.4%
6
1.0%
1
0.2%
2
0.3%
1
0.2%
12
1.9%


Asian/Pacific Islander
94
15.1%
8
1.3%
6
1.0%
2
0.3%
11
1.8%
3
0.5%
3
0.5%
2
0.3%
10
1.6%
43
6.9%


Hispanic
46
7.4%
19
3.0%
6
1.0%
2
0.3%
5
0.8%
0
0.0%
0
0.0%
2
0.3%
1
0.2%
5
0.8%


Native American/Alaskan
2
0.3%
1
0.2%
0
0.0%
0
0.0%
1
0.2%
0
0.0%
0
0.0%
0
0.0%
0
0.0%
0
0.0%


White
287
46.1%
36
5.8%
18
2.9%
5
0.8%
35
5.6%
22
3.5%
27
4.3%
18
2.9%
14
2.2%
89
14.3%


Percentage as a function of Racial Total


African-American
194
31.1%
106
54.6%
23
11.9%
4
2.1%
15
7.7%
6
3.1%
1
0.5%
2
1.0%
1
0.5%
12
6.2%


Asian/Pacific Islander
94
15.1%
8
8.5%
6
6.4%
2
2.1%
11
11.7%
3
3.2%
3
3.2%
2
2.1%
10
10.6%
43
45.7%


Hispanic
46
7.4%
19
41.3%
6
13.0%
2
4.3%
5
10.9%
0
0.0%
0
0.0%
2
4.3%
1
2.2%
5
10.9%


Native American/Alaskan
2
0.3%
1
50.0%
0
0.0%
0
0.0%
1
50.0%
0
0.0%
0
0.0%
0
0.0%
0
0.0%
0
0.0%


White
287
46.1%
36
12.5%
18
6.3%
5
1.7%
35
12.2%
22
7.7%
27
9.4%
18
6.3%
14
4.9%
89
31.0%