n	mean	sx	c	tc	margin of error E	lower limit		upper limit
Nan kahp	12	3.21	2.66	0.9	1.8	1.38	1.83	≤ μ ≤	4.59
Song mahs	29	4.03	2.61	0.9	1.7	0.82	3.21	≤ μ ≤	4.85
Rush hour	25	5.6	3.73	0.9	1.71	1.28	4.32	≤ μ ≤	6.88
Viper	12	26227	15873	0.95	2.2	10085.22	16141.78	≤ μ ≤	36312.22
	lower	upper	mean
Nan kahp	1.83	4.59	3.21
Song mahs	3.21	4.85	4.03
Rush hour	4.32	6.88	5.6