cannot convert the series to class float

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
cannot convert the series to class float	0.68	0.1	8470	73	40
cannot	1.33	0.2	5243	51	6
convert	0.04	0.7	7553	5	7
the	1.21	0.2	9038	83	3
series	1.63	0.9	9383	73	6
to	0.32	0.5	3449	80	2
class	0.11	0.9	7238	91	5
float	1.22	0.8	4108	15	5

Keyword	CPC	PCC	Volume	Score
cannot convert the series to class float	1.87	0.6	7950	69
cannot convert the series to class float math	0.92	0.4	2466	46
cannot convert the series to type float	1.42	1	8525	22
cannot convert series to float	0.46	0.6	2030	13
cannot convert the series to class int	1.85	0.7	4934	58
cannot convert the series to	1.06	0.5	9122	90
change series to float	0.14	0.1	9782	77
f cannot convert the series to converter	1.28	0.2	1320	8
cannot convert float to float	0.08	0.6	5232	3
cannot convert to float	1.45	0.3	480	27
cannot convert string to float	0.67	0.6	4853	92
cannot be converted to float	1.54	0.3	6565	29
series float to int	1.54	0.4	1000	38
could not convert string to float csv	0.95	0.5	8187	42
could not convert string to float: ks	1.99	1	1714	81
python cannot convert series to float	1.05	0.8	8810	64
pandas cannot convert the series to float	1.71	0.3	1520	3
how to convert series to float	1.27	0.7	2541	14