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Analysis and reporting of biostatistical data

Por:   •  25/5/2015  •  Trabalho acadêmico  •  613 Palavras (3 Páginas)  •  558 Visualizações

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HSC2141: Analysing Patterns of Health and Disease

Assessment Task 2: Written assignment – Analysis and

reporting of biostatistical data

Janderson de Araujo Knust - 26215675

Monash University

Section A

1 -

School Type

Frequency

Percentages

1

80

51,61%

2

49

31,61%

3

9

5,81%

4

17

10,97%

Total

155

100,00%

2-

[pic 1]

Figure 1: School Type (frequency) 1 = Co‐educational – government 2 = Single sex – private 3 = Single sex – government 4 = Co‐educational – private (n=155).

3- According to the data 80 of the 155 surveyed attend government co-educational schools and being 51.61% of the total. Of all 155 students, 49 attend to private schools of single sex, being 31.61% of the total. In relation to students that attend to single sex government schools, they are 9 of 155 students and the total of 5.81%. Finally, students of co-educational private schools are a total of 17 of 155 and them 10.97% of the total.

4-

Number of “close friends”

Frequency

Percentages

Cumulative percentages

0

7

4,52%

4,52%

1

19

12,26%

16,78%

2

30

19,35%

36,13%

3

23

14,84%

50,97%

4

34

21,94%

72,91%

5

23

14,84%

87,75%

6

12

7,74%

95,49%

7

4

2,58%

98,07%

8

2

1,29%

99,36%

12

1

0,65%

100%

Total

155

100,00%

5-

[pic 2]

Figure 2: Number of “close friends” self-reported by students (n=155).

6-

According to the data, most students believe that they 4 friends and they are 34 of 155 students being a total of 21.94%. Furthermore, 7 students consider themselves not having friends with a total of 4.52%. 19 students have only 1 friend, namely 12.26%. 30 students consider themselves with 2 friends, being a total of 19.35%. 23 students with 3 friends being a total of 14.84%. 23 students with 5 friends being a total of 6 14,84%. 12 students with 6 friends, a total of 7.74%. 4 students with 7 friends, a total of 2.58%. 2 students with 8 friends being a total of 1.29%. Finally, only 1 student consider to have 12 friends, being a total of 0,65%.

Section B

1 a-

 [pic 3]

Figure 3 – Number of text by number of friends (n=155).

1 b -

r= 0,312433

y = 2,7934x + 19,451
R² = 0,0976

1 c –

R= 0,312433. It means that is no correlation between the numbers of friends and texts. A value near zero means that there is a random, nonlinear relationship between the two variables

2 = 0.0976, which means that approximately 9% of the total variation in texts can be explained by the linear relationship between number of friends and number of texts.  The other 91% of the total variation in the texts remains unexplained.

...

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