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Matemática
Norberto Dias Nº15
Pedro Chilrito Nº16
7ºA
24/04/2013
Variável Quantitativa Discreta  Profundidade
Variável Quantitativa Contínua  Data
2.1. Organiza os dados referentes à profundidade numa tabela de frequências
absolutas e relativas.

Profundidade

Contagem

Frequência
absoluta

Frequência
relativa

[0,5[

I

1

4%

[5,10[

I

1

4%

[10,15[

IIII IIII IIII

14

56%

[15,20[

IIII

4

16%

[20,25[

II

2

8%

[25,30[

III

3

12%

TOTAL

IIII IIII IIII IIII IIII

25

100%
2.2. faz um diagrama de caule e folhas referente à profundidade a que ocorrem os
sismos.
0 17
1 001111223344445899
2 3789
2.3. Qual é a profundidade mais frequente? Qual a designação desta medida de
localização?
R: As profundidades mais frequentes são 11m e 14m. Esta medida de localização é
a Moda.
2.4. Calcula a média da profundidade dos sismos.
1+7+10+10+11+11+11+11+12+12+13+13+14+14+14+14+15+18+19+19+23+27+28+29
25
= 356 = 14,24
25
R: A média da profundidade dos sismos é 14,24
2.5. 50% dos sismos têm profundidade superior ou inferior à profundidade média?
Explica a tua resposta.
R: 50% dos sismos têm profundidade inferior à profundidade média
porque 25:2 =12, e se contarmos 12, acaba na profundidade de 13m.
2.6. Os sismos que ocorrem nesta região são superficiais.
3.1. A amplitude da magnitude é 2,7.
3.2.

3.3. Média =
1,8+1.2+0.6+2.1+1.8+1.1+2+0.7+1.1+1.1+3.1+0.7+1.5+1.6+1.3+1.1+1.7+1.3+1.1+0.9+0.7+1.5+
1.1+2.3+0.4
3.4. Se quiser caracterizar a magnitude dos sismos utilizo a mediana porque indica uma das
magnitudes.
3.5. O local onde ocorreu o sismo de maior magnitude foi em Golfo de Cádiz.
4.1. Organiza os dados por faixas de latitude de 34ºN a 44ºN
numa tabela de frequências absolutas e relativas.
Classes

Contagem

Frequência
Absoluta

Frequência
Relativa

[34,36[

---------------------

0

0%

[36,38[

IIII IIII IIII IIII I

21

84%

[38,40[

II

2

8%

[40,42[

I

1

4%

[42,44[

---------------------

0

0%

Total

IIII IIII IIII IIII IIII

25

96%
25
20
15
10

5
0
[34,36[

[36,38[

[38,40[

[40,42[

[42,44[

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Análise de dados sísmicos

  • 1. Matemática Norberto Dias Nº15 Pedro Chilrito Nº16 7ºA 24/04/2013
  • 2. Variável Quantitativa Discreta  Profundidade Variável Quantitativa Contínua  Data
  • 3. 2.1. Organiza os dados referentes à profundidade numa tabela de frequências absolutas e relativas. Profundidade Contagem Frequência absoluta Frequência relativa [0,5[ I 1 4% [5,10[ I 1 4% [10,15[ IIII IIII IIII 14 56% [15,20[ IIII 4 16% [20,25[ II 2 8% [25,30[ III 3 12% TOTAL IIII IIII IIII IIII IIII 25 100%
  • 4. 2.2. faz um diagrama de caule e folhas referente à profundidade a que ocorrem os sismos. 0 17 1 001111223344445899 2 3789 2.3. Qual é a profundidade mais frequente? Qual a designação desta medida de localização? R: As profundidades mais frequentes são 11m e 14m. Esta medida de localização é a Moda. 2.4. Calcula a média da profundidade dos sismos. 1+7+10+10+11+11+11+11+12+12+13+13+14+14+14+14+15+18+19+19+23+27+28+29 25 = 356 = 14,24 25 R: A média da profundidade dos sismos é 14,24 2.5. 50% dos sismos têm profundidade superior ou inferior à profundidade média? Explica a tua resposta. R: 50% dos sismos têm profundidade inferior à profundidade média porque 25:2 =12, e se contarmos 12, acaba na profundidade de 13m. 2.6. Os sismos que ocorrem nesta região são superficiais.
  • 5. 3.1. A amplitude da magnitude é 2,7. 3.2. 3.3. Média = 1,8+1.2+0.6+2.1+1.8+1.1+2+0.7+1.1+1.1+3.1+0.7+1.5+1.6+1.3+1.1+1.7+1.3+1.1+0.9+0.7+1.5+ 1.1+2.3+0.4 3.4. Se quiser caracterizar a magnitude dos sismos utilizo a mediana porque indica uma das magnitudes. 3.5. O local onde ocorreu o sismo de maior magnitude foi em Golfo de Cádiz.
  • 6. 4.1. Organiza os dados por faixas de latitude de 34ºN a 44ºN numa tabela de frequências absolutas e relativas. Classes Contagem Frequência Absoluta Frequência Relativa [34,36[ --------------------- 0 0% [36,38[ IIII IIII IIII IIII I 21 84% [38,40[ II 2 8% [40,42[ I 1 4% [42,44[ --------------------- 0 0% Total IIII IIII IIII IIII IIII 25 96%