Keyword Analysis & Research: define selection bias in research

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
define selection bias in research	1.32	1	448	98	33
define	1.53	0.4	5085	73	6
selection	0.2	0.7	2075	90	9
bias	1.71	0.5	216	38	4
in	0.92	0.6	1656	56	2
research	0.66	0.6	4083	23	8

Keyword	CPC	PCC	Volume	Score
define selection bias in research	0.86	0.8	3676	31