Loading....
Coupon Accepted Successfully!

PSM

Open Flashcards

Biostatistics

Question
49 out of 76
 

The correlation coefficient between variable A and B is found to be 1.1. This indicates: (AIIMS Nov 2011)



A Very strong correlation

B Moderately strong correlation

C Weak correlation

D Computational mistake

Ans. D Computational mistake

Ref: High Yield Biostatistics, Pg: 47-48

CO-EFFICIENT OF CORRELATION

Correlation is a symmetrical measure of the strength of the association between the two factors, while regression describes how one factor depends on the other.

Correlation gives us a measure of how closely the 2 variables are associated, how close they are to the unlikely event of their lying on a straight line.

If one increases as the other increases, the correlation is positive.

Co-efficient of correlation is always between –1 and +1. Hence a value of CC > +1 or < -1 simply denotes computational mistake.

When zero, it indicates no correlation.

When -1 it indicates negative correlation, when +1 it indicates positive correlation.

Negative correlation is if one increase, other decrease and vice versa.

Biostatistics Flashcard List

76 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
36)
37)
38)
39)
40)
41)
42)
43)
44)
45)
46)
47)
48)
49)
50)
51)
52)
53)
54)
55)
56)
57)
58)
59)
60)
61)
62)
63)
64)
65)
66)
67)
68)
69)
70)
71)
72)
73)
74)
75)
76)