Keyword Analysis & Research: what does a control group mean

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does a control group mean	1.31	0.6	1288	2	30
what	1.06	0.8	1309	67	4
does	1.88	0.1	9743	61	4
a	0.71	0.2	1454	68	1
control	1.66	0.5	4908	94	7
group	1.49	0.9	5112	54	5
mean	0.69	0.6	994	85	4

Keyword	CPC	PCC	Volume	Score
what does a control group mean	0.88	0.6	64	22