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comandos básicos
	
		Os valores abaixo referem-se à medida de viscosidade de uma borracha medida em 216 amostras. Responda às seguintes questões:
	
	
	
	
	
			viscosidade
		Amostra	M1	M2	M3
		1	20.990	21.4522995885	22.0878026624
		2	18.887	18.4739974791	18.8413030433		definir número de amostras com viscosidade < 19					119.000
		3	15.932	17.5359180495	17.7724263403		desvio-padrão		1.7832
		4	17.664	17.5830232642	18.9549395384		estimar desvio-padrão somente viscosidades de amostras ímpares da primeira máquina									1.7533
		5	19.651	20.243418615	21.1357001839
		6	17.407	17.9593280573	19.0277596197		identificar amostras com viscosidade < 17.5 ou > 19
		7	21.235	20.9756653228	22.5434031625		máximo	23.3106
		8	20.788	20.8248673926	21.1974250744		média	19.0884
		9	18.439	18.9570329142	18.8906842333		mediana	18.899
		10	16.318	16.118668711	16.2721836288		mínimo	15.884
		11	20.710	22.1395469946	22.0412804383		ordene crescentemente todas as linhas da tabela ao lado com base na viscosidade da M2
		12	20.853	20.6613280345	22.1379840962		soma	4.12E+03
		13	20.642	21.0605211834	21.2742887172		somar amostras com viscosidade < 19				2110.300
		14	17.172	17.5174448918	18.6388383419		somar somente viscosidades de amostras pares					2050.800
		15	18.101	17.7360895406	18.6772691525
		16	17.175	17.3047256032	17.816350911
		17	16.539	17.0664249949	17.4616103302
		18	18.541	18.7837654573	18.9377994641		1 1 1		16.0290 15.9037 16.1940
		19	20.191	20.6211364989	20.496812429		0 0 0		16.3180 16.1187 16.2722
		20	19.741	19.4679923399	19.6396525985		1 0 0		15.9240 16.2470 17.0800
		21	20.652	20.7636797103	21.2437942938		0 0 0		15.9690 16.4646 16.8114
		22	15.969	16.4646201175	16.8114361398		1 1 1		15.8840 16.6091 16.7277
		23	18.442	18.8560216352	19.1558507915		1 0 1		16.0100 16.6993 17.0383
		24	19.306	19.8691404707	20.3354366235		1 1 1		16.6110 16.8522 17.9252
		25	15.884	16.6091118367	16.727735325		1 1 1		16.6760 16.9491 17.0118
		26	20.801	22.1562198484	22.9044531043		0 0 0		16.8580 16.9598 18.0660
		27	16.915	17.4531436808	17.6509334961		1 1 1		16.5390 17.0664 17.4616
		28	17.873	18.0573481182	18.2690150203		1 1 1		16.1530 17.1449 17.4672
		29	18.550	19.2600809129	19.5772025471		1 1 1		17.1750 17.3047 17.8164
		30	18.496	18.0276161722	18.6588108507		1 1 1		16.7210 17.3349 17.9320
		31	17.619	18.7584310951	19.2247212836		1 0 0		17.4520 17.4126 18.3524
		32	20.090	20.7419669234	21.6593586722		0 0 0		17.5970 17.4396 18.5806
		33	18.704	19.2769401236	19.9638042022		1 1 0		16.9150 17.4531 17.6509
		34	17.916	18.5980679428	18.9072261855		1 1 1		17.1720 17.5174 18.6388
		35	16.721	17.3349101071	17.9320107844		0 0 0		15.9320 17.5359 17.7724
		36	20.947	20.9093915017	22.379912508		1 1 1		17.6640 17.5830 18.9549
		37	20.693	21.4692793141	22.7737048833		1 1 1		18.1010 17.7361 18.6773
		38	18.364	18.1833230832	18.3005313496		1 1 1		17.1750 17.7527 18.9432
		39	16.153	17.1448810453	17.4672460824		1 1 1		16.6310 17.7686 18.9198
		40	17.826	18.4973644168	19.1470412562		0 0 1		17.4070 17.9593 19.0278
		41	18.991	19.8146284111	20.6715930103		1 1 1		18.4960 18.0276 18.6588
		42	17.175	17.7527121694	18.9432427397		1 1 1		17.8730 18.0573 18.2690
		43	21.487	21.3010512782	22.7582286737		1 1 1		17.8720 18.1001 18.6679
		44	21.004	21.2687019538	21.4496805153		1 1 0		18.3640 18.1833 18.3005
		45	17.690	19.3213959955	19.6269767067		0 0 0		18.8870 18.4740 18.8413
		46	16.029	15.9036570814	16.194030744		0 1 1		17.8260 18.4974 19.1470
		47	21.111	21.7719056148	22.4255752883		0 0 0		17.9160 18.5981 18.9072
		48	20.582	20.9146453047	21.6731358019		0 0 1		17.8970 18.6488 18.6632
		49	20.680	21.2435987178	22.063877835		1 1 1		18.1020 18.7094 19.5332
		50	16.631	17.7685615655	18.9198364432		0 1 1		17.9410 18.7238 18.3656
		51	17.872	18.1001439607	18.6678758306		0 0 0		17.6190 18.7584 19.2247
		52	17.452	17.4125967538	18.3524421897		1 1 0		18.5410 18.7838 18.9378
		53	16.676	16.9491403728	17.0118057409		1 1 1		18.4420 18.8560 19.1559
		54	17.945	18.9789849245	18.9409494793		1 1 1		18.1590 18.9416 19.2377
		55	19.662	20.0363458389	21.4863534115		0 0 0		18.0330 18.9454 19.5053
		56	18.814	19.3734847338	19.8967464473		1 1 1		18.4390 18.9570 18.8907
		57	19.856	21.3071198794	20.5216387347		0 0 1		17.9450 18.9790 18.9409
		58	15.924	16.247026963	17.0800362735		0 1 1		18.5290 19.2443 20.0085
		59	18.033	18.9453835538	19.5053048695		1 0 0		18.5500 19.2601 19.5772
		60	18.529	19.244314244	20.0085442558		1 1 1		18.7040 19.2769 19.9638
		61	16.010	16.699284013	17.0383123653		1 1 1		17.6900 19.3214 19.6270
		62	21.218	22.3464259074	23.3105987382		0 1 1		18.8140 19.3735 19.8967
		63	16.611	16.8522396583	17.9252396108		1 1 1		19.7410 19.4680 19.6397
		64	17.597	17.4395521876	18.5805911596		1 1 1		18.9910 19.8146 20.6716
		65	18.159	18.9416270357	19.2376577028		1 1 1		19.2010 19.8424 20.3753
		66	17.941	18.723759745	18.3656141839		1 1 1		19.3060 19.8691 20.3354
		67	18.102	18.7093891029	19.5332208818		1 0 0		19.6620 20.0363 21.4864
		68	20.160	21.2248478482	21.5862459953		0 0 0		19.6510 20.2434 21.1357
		69	19.201	19.8424195045	20.3753347344		1 1 0		20.1910 20.6211 20.4968
		70	17.897	18.648755262	18.6631982509		1 1 1		20.8530 20.6613 22.1380
		71	16.858	16.959837044	18.0659994559		0 0 0		20.0900 20.7420 21.6594
		72	20.624	20.8929527923	22.0160829303		1 1 1		20.6520 20.7637 21.2438
							0 1 1		20.7880 20.8249 21.1974
							1 1 1		20.6240 20.8930 22.0161
							1 1 1		20.9470 20.9094 22.3799
							0 0 1		20.5820 20.9146 21.6731
							0 1 1		21.2350 20.9757 22.5434
							1 1 1		20.6420 21.0605 21.2743
							1 1 1		20.1600 21.2248 21.5862
							1 1 0		20.6800 21.2436 22.0639
							0 1 0		21.0040 21.2687 21.4497
							0 0 1		21.4870 21.3011 22.7582
							0 0 0		19.8560 21.3071 20.5216
							0 0 1		20.9900 21.4523 22.0878
							1 1 1		20.6930 21.4693 22.7737
							1 1 1		21.1110 21.7719 22.4256
							0 0 0		20.7100 22.1395 22.0413
							1 1 0		20.8010 22.1562 22.9045
							1 1 1		21.2180 22.3464 23.3106
sistemas lineares
	
				Resolva os seguintes sistemas lineares
	
	
	
	
		a)		2x + 3y + 4z = 27			2	3	4	27	x	9.2857
				1x - 2y + 3z = 15			1	-2	3	15	y	0.1429
				3x + 1y + 6z = 40			3	1	6	40	z	2
	
	
	
	
		b)	x1	x2	x3	x4	x5	x6		b
			-6	3	2	8	-8	-8	=	50	x1	-16.1645
			-3	-5	-4	-8	2	6	=	30	x2	19.3495
			4	2	-1	-1	4	7	=	26	x3	1.104
			1	2	-4	5	3	5	=	24	x4	-5.6604
			-5	-2	7	-7	7	-5	=	78	x5	2.2709
			0	7	-3	-3	-8	-2	=	120	x6	5.4742
grafico 2D
	
	
		Gere um gráfico de pontos e outro de linha para os dados abaixo (gere uma função para isso, adicionando eixos no gráfico)
	
	
	
	
	
	
		Tempo (mês)	Demanda (unids)
		1	317
		2	194
		3	312
		4	316
		5	322
		6	334
		7	317
		8	356
		9	428
		10	411
		11	494
		12	412
		13	460
		14	395
		15	392
		16	447
		17	452
		18	571
		19	517
		20	397
		21	410
		22	579
		23	552
		24	569
		25	588
		26	607
		27	621
		28	633
		29	661
		30	675
		31	688
		32	709
		33	734
		34	741
		35	767
		36	781
		37	807
		38	816
		39	835
		40	851
		41	867
		42	892
		43	903
		44	921
		45	944
		46	967
		47	983
		48	1003