How do you calculate the mean, variance, and standard deviation from this: The top chart is the 100 value data set and the second table is my frequency table.

	1	11	13	15	20	21	21	25	26	40
	38	38	38	39	39	39	40	40	48	60
	46	46	47	47	47	47	48	48	69	70
	54	54	55	55	55	55	56	57	71	74
	26	28	28	30	30	31	32	32	76	79
	41	41	41	41	42	43	43	43	90	59
	49	49	49	50	50	51	51	51	51	52
	61	61	63	63	64	65	66	67	52	53
	32	33	35	36	36	37	38	26	53	53
	43	43	44	45	45	46	46	40	53	48
	Groups (ranges)	Frequency	Relative Frequency	Cumulative Relative Frequency	CRF as a %
	1 - 10	1	0.01	0.01	1%
	11 - 20	4	0.04	0.05	5%
	21 - 30	10	0.1	0.15	15%
	31 - 40	20	0.2	0.35	35%
	41 - 50	30	0.3	0.65	65%
	51 - 60	20	0.2	0.85	85%
	61 - 70	10	0.1	0.95	95%
	71 - 80	4	0.04	0.99	99%
	81 - 90	1	0.01
	Total	100	1	1	100%