In: Math
Table #10.1.6 contains the value of the house and the amount of rental income in a year that the house brings in ("Capital and rental," 2013). Find the correlation coefficient and coefficient of determination and then interpret both.
VALUE |
RENTAL |
VALUE |
RENTAL |
VALUE |
RENTAL |
VALUE |
RENTAL |
81000 |
6656 |
77000 |
4576 |
75000 |
7280 |
67500 |
6864 |
95000 |
7904 |
94000 |
8736 |
90000 |
6240 |
85000 |
7072 |
121000 |
12064 |
115000 |
7904 |
110000 |
7072 |
104000 |
7904 |
135000 |
8320 |
130000 |
9776 |
126000 |
6240 |
125000 |
7904 |
145000 |
8320 |
140000 |
9568 |
140000 |
9152 |
135000 |
7488 |
165000 |
13312 |
165000 |
8528 |
155000 |
7488 |
148000 |
8320 |
178000 |
11856 |
174000 |
10400 |
170000 |
9568 |
170000 |
12688 |
200000 |
12272 |
200000 |
10608 |
194000 |
11232 |
190000 |
8320 |
214000 |
8528 |
208000 |
10400 |
200000 |
10400 |
200000 |
8320 |
240000 |
10192 |
240000 |
12064 |
240000 |
11648 |
225000 |
12480 |
289000 |
11648 |
270000 |
12896 |
262000 |
10192 |
244500 |
11232 |
325000 |
12480 |
310000 |
12480 |
303000 |
12272 |
300000 |
12480 |
The table as
House | Rental |
81000 | 6656 |
95000 | 7904 |
121000 | 12064 |
135000 | 8320 |
145000 | 8320 |
165000 | 13312 |
178000 | 11856 |
200000 | 12272 |
214000 | 8528 |
240000 | 10192 |
289000 | 11648 |
325000 | 12480 |
77000 | 4576 |
94000 | 8736 |
115000 | 7904 |
130000 | 9776 |
140000 | 9568 |
165000 | 8528 |
174000 | 10400 |
200000 | 10608 |
208000 | 10400 |
240000 | 12064 |
270000 | 12896 |
310000 | 12480 |
75000 | 7280 |
90000 | 6240 |
110000 | 7072 |
126000 | 6240 |
140000 | 9152 |
155000 | 7488 |
170000 | 9568 |
194000 | 11232 |
200000 | 10400 |
240000 | 11648 |
262000 | 10192 |
303000 | 12272 |
67500 | 6864 |
85000 | 7072 |
104000 | 7904 |
125000 | 7904 |
135000 | 7488 |
148000 | 8320 |
170000 | 12688 |
190000 | 8320 |
200000 | 8320 |
225000 | 12480 |
244500 | 11232 |
300000 | 12480 |
The Corelaton coefficeient calculated as
∑ X Values= 8370000
Mean = 174375
∑(X - Mx)2 = SSx = 226935750000
∑ Y Values= 461344
Mean = 9611.333
∑(Y - My)2 = SSy = 230247402.667
X and Y Combined
N = 48
∑(X - Mx)(Y - My) = 5527756000
R Calculation
r = ∑((X - My)(Y - Mx)) / √((SSx)(SSy))
r = 5527756000 / √((226935750000)(230247402.667)) = 0.7647
and Coefficient of determination calculated as by formulae.
Hence Coeeficient if determination calculated as
0.5848 or 58.48%.
Interpretation :
R -squared is statistical measure which shows that how close is our values to the best fitted line or we can say that how the values is coreleated to each other.here value of house is 58.48 % somewhat releated to Rental.