Size Premium Across Regions
Year	Month	Global Market	Developed	Emerging	Europe	Japan	Asia-Pacific Excluding Japan	North America
2020	1	-1.2	-2.16	2.02	0.36	-1.37	-0.96	-2.66
2020	2	-8.54	-1.23	-0.05	0.29	-5.21	-2.53	-0.07
2020	3	-13.77	-3.29	-3.36	-4.22	1	-2.7	-8.07
2020	4	10.68	2.34	1.99	5.04	3.18	1.52	4.13
2020	5	5.3	2.65	1.27	1.21	3.66	6.68	3.13
2020	6	2.76	0.19	1.09	-1.2	0.76	-3.09	2.05
2020	7	4.34	-1.26	-0.78	2.69	-1.4	3.17	-2.32
2020	8	6.84	1.45	1.87	2.91	0.78	1.01	-0.87
2020	9	-3	2.39	0.5	0.85	5.11	3.08	0.79
2020	10	-2.6	1.22	-2.17	1.21	-1.38	-0.54	4.88
2020	11	13.34	0.67	1.03	0.3	-4.72	-2.25	5.23
2020	12	4.82	3.31	-1.79	4.66	-2	1.8	4.8

Question:

Calculate the time-series average returns and standard deviations to the size premiums across the six regions/countries. You should also consider the reward to risk ratios calculated as premium divided by standard deviation.