The lowest strength of association is reflected by which of the following correlation coefficients?
- A$0.95.$
- B$-0.60.$
- C$-0.35.$
- ✓$0.29.$
Answer: D.
View full solution →248 questions across 7 question groups — pick any mix to generate a Economics paper with step-by-step answer keys.
M.C.Q (1 Marks)
89 Q→02True/False
5 Q→03Fill In The Blanks[1 Marks ]
6 Q→041 Marks Question
39 Q→053 Marks Question
43 Q→064 Marks Question
33 Q→076 Marks Question
33 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: D.
View full solution →Answer: C.
View full solution →Answer: B.
View full solution →Answer: B.
View full solution →| S. No. | Method | Formula |
| (i) | Direct Method | $\text{r}=\frac{\Sigma\text{dxdy.n}-(\Sigma\text{dx})(\Sigma\text{dy})}{\sqrt{\Sigma\text{dx}^2.\text{n}(\Sigma\text{dx})^2(\sqrt{\Sigma\text{dy}^2-(\Sigma\text{dy})^2}}}$ |
| (ii) | Short-Cut Method | $\text{r}=\frac{\Sigma\text{xy}}{\text{n}.\sigma_\text{x}.\sigma_\text{y}}$ |
| (iii) | Step Deviation Method | $\text{r}=\frac{\text{dx'dy'.n}-(\Sigma\text{dx'})(\Sigma\text{dy'})}{\sqrt{\Sigma\text{dx'}.\text{n}(\Sigma\text{dx'})^2(\sqrt{\Sigma\text{dy'}-(\Sigma\text{dy'})^2}}}$ |
Answer: C.
View full solution →| X series | Y series | |
| Mean | 15 | 28 |
| Sum of squares of deviation | 144 | 225 |
|
X
|
0
|
2
|
4
|
6
|
8
|
10
|
12
|
|
Y
|
4
|
4
|
6
|
10
|
10
|
8
|
7
|
| Student | A | B | C | D | E | F |
| Marks in Mathematics | 85 | 60 | 55 | 65 | 75 | 90 |
| Marks in Economics | 60 | 48 | 49 | 50 | 55 | 62 |
|
X
|
75
|
88
|
95
|
70
|
60
|
80
|
81
|
50
|
|
Y
|
120
|
134
|
150
|
115
|
110
|
140
|
142
|
100
|
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