Estatistica
445 palavras
2 páginas
EXEMPLO AMOSTRA DAS ALTURAS DE 40 ALUNOS DE UMA SALAEXEMPLO DESVIO PADRÃO E VARIÂNCIA POPULACIONAL
Amostra
40
Média (µ = ∑x /
N)
160,625
SSx
1289,38
2 σ 32,23
Raiz de σ
5,68
Altura x
Média (µ = ∑x /
N)
Desvio x - µ
Quadrados (x µ)
150
151
152
153
154
155
155
155
155
156
156
156
157
158
158
160
160
160
160
160
161
161
161
161
162
162
163
163
164
164
164
165
160,625
-10,625
112,890625
160,625
-9,625
92,640625
160,625
-8,625
74,390625
160,625
-7,625
58,140625
160,625
-6,625
43,890625
160,625
-5,625
31,640625
160,625
-5,625
31,640625
160,625
-5,625
31,640625
160,625
-5,625
31,640625
160,625
-4,625
21,390625
160,625
-4,625
21,390625
160,625
-4,625
21,390625
160,625
-3,625
13,140625
160,625
-2,625
6,890625
160,625
-2,625
6,890625
160,625
-0,625
0,390625
160,625
-0,625
0,390625
160,625
-0,625
0,390625
160,625
-0,625
0,390625
160,625
-0,625
0,390625
160,625
0,375
0,140625
160,625
0,375
0,140625
160,625
0,375
0,140625
160,625
0,375
0,140625
160,625
1,375
1,890625
160,625
1,375
1,890625
160,625
2,375
5,640625
160,625
2,375
5,640625
160,625
3,375
11,390625
160,625
3,375
11,390625
160,625
3,375
11,390625
160,625
4,375
19,140625
166
167
168
168
169
170
172
173
160,625
5,375
28,890625
160,625
6,375
40,640625
160,625
7,375
54,390625
160,625
7,375
54,390625
160,625
8,375
70,140625
160,625
9,375
87,890625
160,625
11,375
129,390625
160,625
12,375
153,140625
∑x=6425
SSx =1289,38
EXEMPLO DESVIO PADRÃO E VARIÂNCIA AMOSTRAL
_
Amostra Média (x = ∑x / n)
40
160,63
Altura x
150
151
152
153
154
155
155
155
155
156
156
156
157
158