NOT true about co-relation is-: (A) Doesn't tell about causation, (B) Tells about risk of the disease, (C) -1.0 correlation shows linear relationship, (D) Tells association between two variables
Answer is B. Ref:Parks 23rd edition pg 852 In order to find out whether there is significant association or not between the two variables , coefficient or Corelation is calculated . r lies between -1 and +1 r near -1 : indicates strong negative correlation . r = 0 : indicates no association r near +1: indicates strong positive correlation. Note: correlation does not necessarily prove causation .