Table 5.

Statistical table of material life.

No.	Control group	Test group	No.	Control group	Test group
1	91.32	40.40	16	95.60	39.47
2	90.19	43.03	17	94.22	39.66
3	91.41	42.59	18	95.25	43.72
4	91.41	37.36	19	93.49	43.81
5	94.52	36.69	20	91.12	41.65
6	90.26	40.03	21	91.12	36.44
7	90.92	42.42	22	90.77	42.98
8	92.61	37.66	23	94.00	39.03
9	94.58	38.20	24	95.56	40.62
10	94.99	40.10	25	93.08	40.60
11	92.21	36.46	26	89.87	38.50
12	90.49	37.42	27	90.47	38.15
13	94.45	43.82	28	91.35	43.21
14	94.53	41.86	29	93.92	39.52
15	95.27	40.04	30	93.14	36.40